Across
Distinguished, though undecorated? (7)
Outstanding money group rejected for laboratory (4,3)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (‘rejected’) of DEBT (‘outstanding money’) plus SET (‘group’ if you are not a mathematician – or if you are, but have no problem with an indication by example).
Lincoln to the west borders quiet ancient kingdom (5)
Shark that’s rude farts when swimming (9)
I haven't cracked this one yet — but Fifteensquared have:
That kind of shark. An anagram (‘when swimming’) of ‘rude farts’.
Rev fills a box with church literature lacking in content (10)
I haven't cracked this one yet — but Fifteensquared have:
An envelope (‘fills’) of CE (‘Church’ of England) plus LE (‘ L iteratur E lacking in content’) in ‘a’ plus CRATE (‘box’).
Asian money sound as a bell (4)
Fat bags for every brand that’s a big seller (11)
I haven't cracked this one yet — but Fifteensquared have:
An envelope (‘bags’) of PER (‘for every’) plus MARK (‘brand’) in SUET (‘fat’).
Classic published about which written huge pile of notes, work recited (3,3,5)
See 6 Down
The rich and famous pigs at one with leader in government? (10)
I haven't cracked this one yet — but Fifteensquared have:
A charade of G (‘leader in G overnment’) plus LITTER (‘pigs’ – the question mark is called for here, I think) plus ‘at’ plus I (‘one’, Roman numeral or impersonal pesonal pronoun).
Visiting Cambridge later, I assume summer tourists would go there (9)
Front men on the radio? (5)
College essay’s covered in that stuff (7)
I haven't cracked this one yet — but Fifteensquared have:
An envelope. but not the way round that it might seem at first. A envelope (‘covered’ as transitive) of ‘in’ plus IT (‘that stuff’) in TRY (‘essay’), for the college in Oxford, Cambridge, Dublin and elsewhere.
With top off, female working in 14 across? (7)
Down
Exchange coupon, finally joining 14 across queue, say? (6)
I haven't cracked this one yet — but Fifteensquared have:
A charade of N (‘coupo N finally’) pluas ASDA (’14 across’ – SUPERMARKET) plus Q (‘queue, say’).
Island 14 across opened by king (6)
I haven't cracked this one yet — but Fifteensquared have:
An envelope (‘opened by’ – not starting with) R ( rex , ‘king’) in TESCO (’14 across’ – SUPERMARKET). Tresco is one of the Scilly Isles off Cornwall.
Garden’s cold, almost shivering in the night air (10)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (‘shivering’) of ‘gardens col[d]’ minus the last letter (‘almost’), with a cryptic definition. Chambers lists the answer as hyphenated, but, as with many such compounds, separate words, hyphenated and oneword are all reasonable, perhaps with a progression over time in that order. If I were to give out ticks, that would get a handful.
Put off as revolutionary supplied with rations again? (5)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (‘revolutionary’) of RE-FED (‘supplied with rations again’).
Restaurant where a rubbish dessert served up, one scoffed (9)
I haven't cracked this one yet — but Fifteensquared have:
An envelope (‘scoffed’) of I (‘one’) in a reversal (‘served up’ in a down light) of ‘a’ plus ROT (‘rubbish’) plus TART (‘dessert’, assuming the sweet kind).
21a
Chemical used in anaesthesia, it appears I’m a surrealist! (4,4)
Uprising overblown in English county seat (8)
Belittle Greek character impaled from below (8)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (‘from below’ in a down light) of ETA (‘Greek character’) plus GORED (‘impaled’).
With pins visible, a bleeder badly cut by mount (10)
Messed up with payroll, by and large (9)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (‘messed’) of ‘up’ plus ‘payroll’.
Figure-hugging clothes fade briefly in autumn (8)
Principality’s family 14 across that’s ghastly? (8)
Green dresses perfect ultimately for mother (6)
I haven't cracked this one yet — but Fifteensquared have:
An envelope (‘dresses’) of T (‘perfec T ultimately’) in NAIVE (‘green’). ‘Mother’ as in mother country.
Romantic novel authors from Hollywood discussed? (6)
Track runs between 7 down (5)
I haven't cracked this one yet — but Fifteensquared have:
An envelope (‘between’) of R (‘runs’) in TAIL (‘7 down’ – BUTTOCKS).
The Four Tops in elegant tuxedos, unique in fashion designer’s case? (4)
Type letters or click words in the clue