Across
Earlier term for monastery or other religious building (6)
I haven't cracked this one yet — but Fifteensquared have:
PRIOR (earlier) + final letter (term) of [monaster]Y
Tense anger about King’s ultimatum (6)
I haven't cracked this one yet — but Fifteensquared have:
T (tense) + HEAT (anger) round R (king)
Problem in America backing hostile stance (6)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (backing) of SUM (problem) IN A (in America)
Ecstatic feeling reversed unparalleled regret after consuming noodle soup (8)
I haven't cracked this one yet — but Fifteensquared have:
A reversal of A1 (unparalleled) RUE (regret) round PHO (a Vietnamese noodle soup)
Animal cry beginning to resound over a river (4)
I haven't cracked this one yet — but Fifteensquared have:
R[esound] + O (over) + A R (a river)
Calm debate has father overruling copper (10)
I haven't cracked this one yet — but Fifteensquared have:
DISCUSSION (debate) with PA (father) replacing (overruling) cu (copper)
Lawless people who may be found climbing rocky brutal crags (3,8)
Hostility? A good man is not provoked (10)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (provoked) of A G[ood] MAN IS NOT
Signal information for racing fraternity I overlooked (4)
Line secured by camping expert? It often flaps about (8)
I haven't cracked this one yet — but Fifteensquared have:
TENT ACE (camping expert?) round l (line)
Country set in mostly established area (6)
I haven't cracked this one yet — but Fifteensquared have:
TV (set) in LAI[d] (mostly established) + A (area)
Critical comment about Scottish island – no end to that uproar (6)
Supplementary ROM eminently embodies this, on reflection? (6)
Down
Beginning to threaten song after the wee small hours? It must be the liqueur (3,5)
I haven't cracked this one yet — but Fifteensquared have:
T[hreaten] + ARIA (song) after I AM (1 am – the wee small hours
Times editor getting rubbed out (6)
Steal dog and lizard (8)
People often emulated that man and revolted, we hear (6)
Secure one working cogwheel (6)
One has three legs? That'll be the consequences of taking drugs (6)
Leaf collector, or artisan working with tree (3-8)
Sibling about to get upset stomach, mostly from vegetable (8)
Prayer allowance about to proceed heavenwards (8)
I haven't cracked this one yet — but Fifteensquared have:
RATION (helping) round a reversal (heavenwards, in a down clue) of GO (proceed)
Wretched person who's joined religious movement? (6)
US University coming in to repudiate ignoring Democratic opposition (6)
Variation in maths and algebra finally leading to complaint (6)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (variation) of MATHS and [algebr]A
The writer’s uplifting story, linked to high-class environment (6)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (uplifting) of I’M (the writer’s) + LIE (story) + U (high-class)
Type letters or click words in the clue