Across
Hungary and Austria engaged in awkward diplomacy — it offers hope of relaxation (7,4)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (awkward) of H (Hungary) and A (Austria) (International Vehicle Registration) and DIPLOMACY
Patrons beginning to collect stories about preservation body (7)
I haven't cracked this one yet — but Fifteensquared have:
C[ollect] + LIES (stories) round NT (National Trust – preservation body)
Novelty in religious education provided by Catholic encyclopaedia (7)
Religious leader occupying tower before a melodramatic performance (4,5)
I haven't cracked this one yet — but Fifteensquared have:
POPE (religious leader) in SOAR (tower) + A
Dog knocked over front of hen house? (5)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (knocked over) of H[en] COOP (house – for a hen)
Regular contributors to main course, not starter and desserts (4)
A woman keeping a note and cash, resisting all requests (10)
I haven't cracked this one yet — but Fifteensquared have:
A DAME (a woman) round A N (a note) + TIN (cash)
Ridiculous situation reversed in second convention for high-level transport (10)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (reversed) of FARCE (ridiculous situation) in S (second) PACT (convention)
Stop setback for majority of poll? (4)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (set back) of most of VOTE (poll) – I think
Variable quantity dropped from agreement — that’s a surprise (5)
Star, initially cross with role, rejected stage features (9)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (rejected) of S[tar] + ROOD (cross) + PART (role)
States answers to restrict explosion in crime (7)
I haven't cracked this one yet — but Fifteensquared have:
A A (answers) round an anagram (explosion) of CRIME
Extract of publication is edifying, with a charge (7)
Glare? Good with glares, possibly keeping 1,000 subdued (4,7)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (possibly) of GOOD with GLARES round K (1,000)
Down
Comment about one that’s gone to get source of water after pepper with food (4,3,8)
I haven't cracked this one yet — but Fifteensquared have:
WELL (source of water) after HAIL (pepper, as with bullets, for instance) and FARE (food) The formal Roman address (Ave atque vale) to the dead, especially in a eulogy to a hero and the title of Catullus’ poem on the death of his brother I also found this in Wikipedia
Language in poetry extract reduced success (5)
Balloon first to block dead end (7)
I haven't cracked this one yet — but Fifteensquared have:
IST (first) in D (dead) END – not a very satisfactory clue, unless I’m missing something
Crazy fish leaping up around right end of spar (7)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (leaping up, in a down clue) of MAD (crazy) round R (right) + RAY (fish)
Single-handedly capturing top criminal (2,6)
What may parody some pinto mares (source of humour?) (9,6)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (indicated by the question mark) of SOME PINTO MARES + H[umour] – with an extended definition
Legislation on drink fails to work properly (4,2)
A lot of pleasure supplied by peel of lemony fruit (6)
Nationalist in routine wrangling — one has almost zero impact (8)
Guidance system positioned vehicle in the wrong direction (6)
County secure, on track (7)
Furious English author with article for English (7)
I haven't cracked this one yet — but Fifteensquared have:
(Ian) FL[e]MING (English author) with A (article) for e (English)
Old, imprisoned? One escapes, still able to achieve goal (6)
Poet, not hurried, withdrawing article (5)
Type letters or click words in the clue