Across
Pair observed in theatre favoured massage of Austrian musician? (6,6)
Extra bill passed, one withdrawn (5)
I haven't cracked this one yet — but Fifteensquared have:
AD (bill) + DE[a]D (passed) minus a (one)
Small wave tapped in source of water (9)
Very small house, Oxford home? (7)
I haven't cracked this one yet — but Fifteensquared have:
Play on Oxford being a type of shoe – here’s an example of a shoebox home
18a
What criminal might do with key before door's opening - might that prove lucky? (7,4)
Youth appearing 18 down, less so in DJ? (6,4)
A bird busy as a bee? (2,2)
I haven't cracked this one yet — but Fifteensquared have:
A TIT (a bird)
See 12
Manually-operated toy hit with tool (4,6)
Frank in striker's role? (2,5)
Something for a Yorkshireman opening for Spooner? (4,3)
I haven't cracked this one yet — but Fifteensquared have:
Spooner’s CAT FLAP (opening) – we haven’t seen this commenter for a while, I think
Rely on family for supply of claret? (5,4)
Scent old motor manufacturer has lifted bonnet? (5)
Grant including a loan chased by auditor for specific period (8,4)
I haven't cracked this one yet — but Fifteensquared have:
CARY (Grant) round A LEND (a loan) + EAR (auditor)
Down
Familiar voice replied initially: "farewell Jack" (5,4)
I haven't cracked this one yet — but Fifteensquared have:
R[eplied] + ADIOS (farewell) + TAR (Jack)
Kick in the teeth, or punch further down? (4,4)
Kent area, looking north: the other county (5)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (looking north, in a down clue) of S[outh] E[ast] (Kent area) + SEX (the other)
Car's kit shifted, first say switched up? (4,5)
Old road and river dropping? (6)
Author of manifesto, I learned, doing a U-turn (5)
Even though deeper than US state, it's a group of mountains (6)
Torrid, Spooner's corruption of the mind? (3-3)
I haven't cracked this one yet — but Fifteensquared have:
Spooner’s ‘head rot’ (corruption of the mind) – two Spoonerisms in one puzzle is one too many for me
20d
Worker in spotty shirt mistaken for secretary (9,6)
Greatest striker, marker after shirt, say? (3,6)
Smoker deciphering formulae (8)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (deciphering) of FORMULAE – a new word for me: a hole emitting gases from a volcano
Porky and fishy? (6)
See 14
24d
Ladies' man loafed about during game (6-5)
Vegetation left that's fenced off by councils (5)
See 21
Type letters or click words in the clue