Across
Retail worker overwhelmed by thank-you letters' positive conclusions (11)
I haven't cracked this one yet — but Fifteensquared have:
HAND (worker) in or ‘overwhelmed by’ MERCI (thank-you) S E (last letters or ‘conclusions’ of letters’ positive)
Some enthusiastic church reformer (3)
See 27 Across
Part of eye movement that can't be controlled after operation date is cancelled initially (5,4)
I haven't cracked this one yet — but Fifteensquared have:
TIC (‘movement that can’t be controlled’) after OP (operation) + D (date) IS C (first or ‘initial’ letter of cancelled)
One expected to make a comeback - was a manager in, say, a period of growth earlier (9)
I haven't cracked this one yet — but Fifteensquared have:
RAN (was a manager) in EG (‘say’) with BOOM (a period of growth) in front or ‘earlier’
See 8 Down
Former tennis player mostly very unpleasant like Edberg initially (7)
I haven't cracked this one yet — but Fifteensquared have:
NAST y (very unpleasant) missing the last letter or ‘mostly’ AS (like) E (first or ‘initial’ letter of Edberg)
Heartless confrontation causes havoc (4)
I haven't cracked this one yet — but Fifteensquared have:
RU n -IN (confrontation) missing the middle letter or ‘heartless’
Dangerous beast demolished half of plates, dishes etc. (4)
I haven't cracked this one yet — but Fifteensquared have:
CROC kery (plates, dishes etc) with the second half ‘demolished’
Keep secret visit short, previously being drunk (7)
I haven't cracked this one yet — but Fifteensquared have:
CAL l (visit) missing the last letter or ‘short’ with ONCE (previously) inside or ‘being drunk’
25d
(and 25 Down) Canada's leader and others taking part in summits to find a way to end war (5,5)
Royal family treasuring good times over in European city (9)
I haven't cracked this one yet — but Fifteensquared have:
STUART (Royal family) round or ‘treasuring’ a reversal (‘over’) of G (good) TT (times)
Criminal director invented language books changed into Dutch (9)
I haven't cracked this one yet — but Fifteensquared have:
D (director) ESPERA nt O (invented language) with ‘nt’ (new testament – ‘books’) changed to D (Dutch)
9a
(and 9 Across) Very funny! Motown’s Diana cuddled by ladies perhaps, then leaves (5,5)
So poorly articulated (3)
I haven't cracked this one yet — but Fifteensquared have:
A homophone (‘articulated’) of SICK (poorly)
Blow away (4,2,5)
I haven't cracked this one yet — but Fifteensquared have:
Cryptic definition – we were not very convinced by this, but a storm would blow things away, so it does work after a fashion as it can also mean “to captivate totally and instantly’
Down
Almost dead bone found in burial place possibly (8)
I haven't cracked this one yet — but Fifteensquared have:
RIB (bone) in MOUND (burial place possibly)
Silly person finally gives incomprehensible answer (8)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (‘silly’) of PERSON + S E (last or ‘final’ letters of gives incomprehensible)
Prostitute has no right to become a physicist (5)
I haven't cracked this one yet — but Fifteensquared have:
HOOKE r (prostitute) missing the ‘r’ (right) – we had never heard of this English 17th century physicist
Number 10 in a certain context worried for new arrival (7)
I haven't cracked this one yet — but Fifteensquared have:
It took us a while to figure this one out – NEON (element with the atomic number 10 – ‘in a certain context’) ATE (worried)
Get Back central to popular US TV series, not just any number (7)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (‘back’) of GET in or ‘central to’ IN (popular) ER (US TV series)
Former Tory securing millions in a mostly big exchange of land (9)
I haven't cracked this one yet — but Fifteensquared have:
EX (former) CON (Conservative – Tory) round or ‘securing’ M (millions) in A BI g missing the last letter or ‘mostly’ – a new word for us
Musical act shows style (6)
17d
(and 12 Across, 17 Down) Head of state made a political broadcast in favour of the introduction of Musk's X perhaps (6,5,8)
Welcome inspiring fellows following a concert (9)
I haven't cracked this one yet — but Fifteensquared have:
GREET (welcome) round or ‘inspiring’ MEN (fellows) after or ‘following’ A
Energy provider at last involved in rising fuels for Turkish palace (8)
I haven't cracked this one yet — but Fifteensquared have:
E (energy) R (last letter of provider) ‘involved’ in a reversal (‘rising’) of OIL GAS (fuels)
See 8 Down
Traditional Russian or Ukrainian function with dry white wine (7)
I haven't cracked this one yet — but Fifteensquared have:
COS (cosine – ‘function’) SACK (dry white wine)
Two characters promoted in TV detective's unit (7)
I haven't cracked this one yet — but Fifteensquared have:
COLUMBO (TV detective) with the U and second O separately moved forward or ‘promoted’
Emphatically not wearing a suit (6)
I haven't cracked this one yet — but Fifteensquared have:
‘In SPADES’ can mean ’emphatically’. If you are ‘wearing’ something you are ‘in’ it – so ‘not wearing’ suggests omitting ‘in’
Break down clues at first, that will get you extremely far (6)
I haven't cracked this one yet — but Fifteensquared have:
PARSE (break down) C (‘first’ letter of clues)
See 23 Across
Type letters or click words in the clue