Across
Bit of drink to convey threat to Aussie, supposedly (4,4)
Glimpse gold-plated seat missing rear (6)
See 24
Son unenthusiastic about hospital call when he should be studying? (6,4)
I haven't cracked this one yet — but Fifteensquared have:
S (son) + COOL (uninterested) round H (hospital) + TERM (call, as a verb)
Very, very good occupying tavern, but to no effect (2,4)
I haven't cracked this one yet — but Fifteensquared have:
V (very) + A1 (very good) in INN (tavern)
Interplay of tide and dune not checked (8)
Draw US lawyer to right law (7)
Conservative guy, not too bright, seen around Republican festival (7)
I haven't cracked this one yet — but Fifteensquared have:
C (Conservative) + HIMBO (guy, not too bright) round R (Republican) – a jorum for me: with very little confidence, I looked up HIMBO and found ‘an attractive but empty-headed young man’ – obvious now, of course: a male bimbo I wouldn’t ever use CHRIMBO but, if I did, I wouldn’t include an h – it’s in Collins but not Chambers
Trick sign containing Government name (8)
I haven't cracked this one yet — but Fifteensquared have:
CON (trick) round G (Government) + SIGN (omen)
Rector intervening in University accommodation protest? (6)
I haven't cracked this one yet — but Fifteensquared have:
R (rector) in U NEST (University accommodation)
Nuns and monks initially among the very best groups of motorists? (10)
I haven't cracked this one yet — but Fifteensquared have:
M[onks] in CAR ELITES (fancifully, the very best groups of motorists) There are also Carmelite monks
10a
Trumpeter’s accessories provided by pale relative of trumpeter? (4,4)
What Admiral’s found in hold? (6)
Good for France, back under governance – such as the aristocracy? (8)
Down
Fishing accessory, crude, left covered by overturned canvas (5,3)
I haven't cracked this one yet — but Fifteensquared have:
RAW (crude) + L (left) in a reversal (overturned) of TENT (canvas)
Tournament going ahead, accommodating training during 11? (4)
Common sense in scripture lessons supported by a disciple (6)
I haven't cracked this one yet — but Fifteensquared have:
RE (Religious Education – scripture lessons) + A SON (a disciple)
Classic musician’s musical work twice interrupted by King and ambassador (7)
I haven't cracked this one yet — but Fifteensquared have:
R (king) and HE (His / Her Excellence – ambassador) – separately, in OPUS (musical work)
Comment about a new central heating that uses very small components (8)
I haven't cracked this one yet — but Fifteensquared have:
NOTE (comment) round A N (a new) + CH (central heating)
Information provided in Rhineland city for ‘improver’ of community (10)
I haven't cracked this one yet — but Fifteensquared have:
GEN (information) IF (provided) in TRIER (Rhineland city)
Gain account with regret (6)
Someone skilled in the field – and margins too, possibly (10)
Understand policy about introduction of military service (8)
I haven't cracked this one yet — but Fifteensquared have:
COP (understand) round M[ilitary] + LINE (policy)
Desperately in love, French are excessive in sexual activity (8)
I haven't cracked this one yet — but Fifteensquared have:
ES (French for are, second person singular) + OTT (excessive) in BED (sexual activity)
Second article all but elsewhere (7)
I haven't cracked this one yet — but Fifteensquared have:
AN (article) + THER[e] (elsewhere, all but) Edit: A + NOT HER(e) – thanks, KVa @3
Sanctioned ‘natter’ to turn up in dictionary (6)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (to turn up, in a down clue) of YAK (natter) in OED (Oxford English Dictionary)
Bear’s second to enter water (6)
Way of working ascribed to American musician (4)
Type letters or click words in the clue