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Daily Telegraph Puzzle Number DT 26833 | 
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Publication Date in The Daily Telegraph Friday, April 6, 2012 | 
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Setter Giovanni | 
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Link to Full Review Big Dave's Crossword Blog [DT 26833] | 
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Big Dave's Review Written By Crypticsue | 
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Big Dave's Rating  | 
   | Difficulty - ★★★ | Enjoyment - ★★★ | 
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Falcon's Performance  
┌────┬────┬────┬────┬────┬────┬────┐ 
███████████████████████████████████ 
└────┴────┴────┴────┴────┴────┴────┘ 
Legend: 
█ - solved without assistance 
█ - incorrect prior to use of puzzle solving tools
 
█ - solved with assistance from puzzle solving tools 
█ - solved with aid of checking letters provided by puzzle solving tools 
█ - unsolved or incorrect prior to visiting Big Dave's blog 
█ - reviewed by Falcon for Big Dave's blog | 
  
Introduction
Despite the fact that this puzzle appeared in 
The Daily Telegraph on Good Friday and was compiled by Giovanni (who often includes clues with religious connotations in his creations), this puzzle surprisingly contains no religious references.
I needed a bit of electronic help to identify a piece of British railway equipment as well as an item of building material that I had not previously encountered.
Notes on Today's Puzzle
This commentary is intended to serve as a supplement to the review of this puzzle found at Big Dave's Crossword Blog, to which a link is provided in the table above.
6a   Tree found in part of London (6)
Poplar[7]  is a historic, mainly residential area of the East London in the London Borough of Tower Hamlets. It is about 5.5 miles (8.9 km) east of 
Charing Cross[7]  (since the second half of the 18th century Charing Cross has been seen as the centre of London).
10a   Dad gets shown reconstructed piano in uncle’s place (8)
Uncle[5]  is an archaic, informal term for a pawnbroker.
As for 
piano, if you happen to have forgotten what this musical term means, just check my blog postings from Monday or Wednesday of last week.
19a   Hits coming from small child in the middle of lesson (6)
One meaning of 
mite[5]  is 
a small child or animal, especially when regarded as an object of sympathy •
  the poor little mite looks half-starved.
21a   Instrument with which this person has left theatre (8)
Odeon Cinemas[7]  is a British chain of cinemas, one of the largest in Europe, created in 1928 by Oscar Deutsch. Odeon publicists have dubiously claimed that the name of the cinemas was derived from his motto, "
Oscar 
Deutsch 
Entertains 
Our 
Nation". It would appear that the term 
odeon[5]  may have become genericized in Britain as a synonym for cinema, in the same way that kleenex has become synonymous with facial tissue).
Odeon also operated a wholly owned Canadian subsidiary, Odeon Theatres (Canada) Ltd., with more than a hundred cinemas in Canada, coast-to-coast. This business was sold in 1978 to the Canadian Theatres chain and 
became Canadian Odeon Theatres, then was sold again in 1984 to Cineplex, forming Cineplex Odeon (now, once again, Cineplex).
25a   Dancing round in truck (6)
Bogie[5]  is a chiefly British term for 
an undercarriage with four or six wheels pivoted beneath the end of a railway vehicle. An alternative name for this piece of equipment in Britain (and the name by which it is commonly known in North America) is truck[3,4,5].
Judging by the discussion at Big Dave's site, perhaps the use of the word 
truck as a synonym for a 
bogie (in the sense of an undercarriage for a railway car) is not so common in Britain – although it is clearly defined as such in the Oxford Dictionaries entry. Many of the Brits referred to alternative meanings (although still from the railway domain) for these words. In Britain, a 
truck[5]  may be 
a railway vehicle for carrying freight, especially a small open one and a bogie[4]  can be a small railway truck of short wheelbase, used for conveying coal, ores, etc.
It seems that, in Britain, a railway vehicle for carrying passengers is called a 
car[4]  and one for transporting freight is called a 
truck[4]. In North America, any such railway (or, in the US, railroad) vehicle would be called a 
car[4]  (distinguished by prefixing a modifier, such as passenger car, freight car, etc.).
26a   We in the army will want ruler to be changing slightly (8)
In the UK, the 
Territorial Army (
TA)
[5]  is 
a volunteer force  locally organized to provide a reserve  of trained and disciplined manpower for use in an emergency.
4d   Grabbed by bounder, simpleton is kissed and cuddled (9)
While of no bearing on today's clue, I did note from my perusal of the dictionaries that, in Britain, 
canoodle[3]  seems to lack the secondary meaning of to win over or convince by cajoling or flattering or, in other words, to wheedle • 
"his matchless ability to charm, bamboozle, or canoodle most of his political associates" (Timothy Garton Ash).
8d   A stucco I fancy as characteristic of auditorium? (8)
One might be able to contort the definition "characteristic of auditorium" into being an adjective, but it does seem to call for a noun. If the solution is meant to be an adjective, 
acoustic[5]   would certainly work. From this same entry, we see that (as a noun) 
acoustic  (also 
acoustics) mean
s the properties or qualities of a room or building that determine how sound is transmitted in it •
  the Symphony Hall has perfect acoustics. I am accustomed to seeing this term with the latter spelling (with an 
s on the end), and the only place I found it without a final 
s (having this meaning) was this entry from Oxford Dictionaries. Note that despite seemingly showing 
acoustic as the primary entry, Oxford chooses to present a usage example in which the word is spelled 
acoustics rather than 
acoustic.
13d   Piece of wood to lean in hanging support (9)
Like Crypticsue, I too was unfamiliar with this "piece of wood". A 
scantling[5]  is 
a timber beam of small cross section.
Not having a solution for 25a, I spent a good deal of time in a fruitless effort to make the last four letters be -LIST ("to lean").
15d   Soldier gives sign for pausing followed by frantic nod (8)
The term commando[4]  comes from Afrikaans and originally referred to an armed force raised by Boers during the Boer War.
17d   Order chaps in court to provide explanatory note (7)
The 
Order of Merit[7]
  (abbreviation 
OM[5]) is a dynastic order recognising distinguished service in the armed 
forces, science, art, literature, or for the promotion of culture. 
Established in 1902 by King Edward VII, admission into the order remains
 the personal gift of its Sovereign, the reigning monarch of the 
Commonwealth realms, and is limited to 24 living recipients at one time 
from these countries plus a limited number of honorary members. The current membership includes one Canadian (former Prime 
Minister Jean Chrétien).
Chap[5]  may be a chiefly British informal name for 
a man or a boy –
 but it is a term that is far from being unknown outside the UK.
18d   Stupid person crossing road was a famous general (6)
Apparently the original meaning of 
goon[4]  is a stupid or deliberately foolish person. However, in North America, the word has come to mean a thug hired to commit acts of violence or intimidation, especially in an industrial dispute [
leading the Collins English Dictionary to classify it as a term belonging to the field of Industrial Relations!].
Major-General 
Charles George Gordon[7], CB (1833 – 1885) was a British army officer and administrator.
Gordon saw action in the Crimean War as an officer in the British army, but he made his military reputation in China. He later became the 
Governor-General of the Sudan, where he did much to suppress revolts and
 the slave trade. Exhausted, he resigned and returned to Europe in 1880.
Then a serious revolt broke out in the Sudan, led by a Muslim reformer and self-proclaimed Mahdi, Muhammad Ahmad. Gordon was sent to Khartoum
 with instructions to secure the evacuation of loyal soldiers and 
civilians, and depart with them. After evacuating about 2,500 British 
civilians he retained a smaller group of soldiers and non-military men. 
As an ardent Christian evangelist he was determined to stand up to the 
Mahdi, his Muslim nemesis. In the build up to battle the two leaders 
corresponded attempting to convert the other to their respective faiths,
 but neither would comply. Besieged by the Mahdi's forces, Gordon 
organized a city-wide defence lasting almost a year that gained him the 
admiration of the British public, though not the government, which had 
not wished to become involved (as Gordon had known before setting out). 
Only when public pressure to act had become too great was a relief force
 reluctantly sent. It arrived two days after the city had fallen and 
Gordon had been beheaded.
22d   Director, foul, had G&T maybe (5)
A 
G&T[5]  is 
a drink of gin and tonic. However, since this seems to be one of several available choices ("maybe"), make mine a Scotch.
Key to Reference Sources: 
[1]   - The Chambers Dictionary, 11th Edition 
[2]   - Search Chambers - (Chambers 21st Century Dictionary)
[3]   - TheFreeDictionary.com (American Heritage Dictionary)
[4]   - TheFreeDictionary.com (Collins English Dictionary)
[5]   - Oxford Dictionaries (Oxford Dictionary of English) 
[6]   - Oxford Dictionaries (Oxford American Dictionary)
[7]   - Wikipedia
[8]   - Reverso Online Dictionary (Collins French-English Dictionary)
[9]   - Infoplease (Random House Unabridged Dictionary)
[10] - CollinsDictionary.com (Collins English Dictionary)
Signing off for today – Falcon