Across
Groovy district in an English county? (7)
I haven't cracked this one yet — but Fifteensquared have:
RUT-LAND(how you might describe a district/a region that has ruts/grooves in it).
Adult rabbit going outside to get drink (7)
I haven't cracked this one yet — but Fifteensquared have:
A(abbrev. for “adult”) + LOP(a kind of rabbit, one with floppy ears) containing ( going outside ) COP(to get/to catch).
Inspector's wife visiting stormy isle (5)
I haven't cracked this one yet — but Fifteensquared have:
W(abbrev. for “wife”) contained in ( visiting ) anagram of ( stormy ) ISLE .
Single portion fills in snack in two sections (9)
I haven't cracked this one yet — but Fifteensquared have:
[ I(Roman numeral for “one”/single) + PART(a portion/section of a whole) ] contained in ( fills in ) BITE(a snack/a titbit).
Disease in which mercy a goal potentially (10)
Kay previously called for joint (4)
I haven't cracked this one yet — but Fifteensquared have:
K(the letter “Kay”) + NEE(previously called/name when born, used to introduce a married woman’s maiden name).
Singer one seen in uproarious 20 2: we must leave! (6,5)
I haven't cracked this one yet — but Fifteensquared have:
I(Roman numeral for “one”) contained in ( seen in ) anagram of ( uproarious ) “ FAWLTY TOWERS “(answer to clue 20down 2down) minus ( … must leave ) “ we “.
Endlessly dangerous Romeo up for fun indoors (7,4)
I haven't cracked this one yet — but Fifteensquared have:
Last letter deleted from ( Endlessly ) “parlous”(archaic term for “dangerous”/perilous) + R(letter represented by “Romeo” in the phonetic alphabet) + GAME(up for/eager and willing to do something challenging).
Prickly shrub took an upward course (4)
I haven't cracked this one yet — but Fifteensquared have:
Double defn: 1st: Thorny/prickly shrub.
Plant at least three detectives in Vauxhall? (10)
I haven't cracked this one yet — but Fifteensquared have:
[ PI(abbrev. for “private investigator”/detective) + DIS(abbrev. for more than 1 “Detective Inspector”) ](making 3 or more detectives) contained in ( in ) ASTRA(a model of car manufactured by Vauxhall Motors Limited).
Office workers' duck croaks having swallowed article (3,6)
I haven't cracked this one yet — but Fifteensquared have:
TEAL(a small freshwater duck) + DIES(in slang, croaks/kicks the bucket) containing ( having swallowed ) A(article in English grammar).
Principle that is absorbing Democrat completely? Almost! (5)
I haven't cracked this one yet — but Fifteensquared have:
IE(abbrev. for “id est”/that is) containing ( absorbing ) D(abbrev. for “Democrat”) + “all”(completely/entirely) minus its last letter ( Almost ).
Dope dealer in seconds confessed in A&E (7)
I haven't cracked this one yet — but Fifteensquared have:
[ S(abbrev. for “seconds”, in time notation) + SANG(slang for “confessed”/admitted to committing a crime, and perhaps implicating others as well) ] contained in ( in ) [ A and E ].
Grass and tree riddled with insects (7)
I haven't cracked this one yet — but Fifteensquared have:
TI(a genus of tropical trees) + MOTHY(riddled/infested with moths, a group of insects).
Down
Get the next round in? (6)
I haven't cracked this one yet — but Fifteensquared have:
Cryptic defn: Not a round of drinks, but an amount of ammunition in order to fire another single shot from a weapon.
See 20 Down
Arrogance shown in an RC feast? (10)
I haven't cracked this one yet — but Fifteensquared have:
Double defn: 1st: …/presumption; and 2nd: A feast in honour of the reception of Mary bodily into heaven, celebrated by Roman Catholics.
Remove trousers — bad egg to miss a good thrashing (5)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of ( … thrashing ) “ bad egg ” minus { “ a ” + “g”(abbrev. for “good”) ].
Shock when pair climbing spotted mount (9)
I haven't cracked this one yet — but Fifteensquared have:
APPAL(to shock/horrify) + reversal of ( … climbing , in a down clue) [ AS(when/at that particular moment, as in “as you enter”) + OO(I’m not sure about this: letters representing a pair of eyes? Spectacles? Breasts? Or is it just a pair of letters) ].
I'm surprised by king in Irish city (4)
Margaret covering one with Nancy's black dressing-gown (8)
I haven't cracked this one yet — but Fifteensquared have:
PEG(short version of the name “Margaret”) containing ( covering ) I(Roman numeral for “one”) plus ( with ) NOIR(“black” in the language of Nancy, a French city).
In crowd Treebeard for one holds out (8)
I haven't cracked this one yet — but Fifteensquared have:
PRESS(a crowd/a mass of closely packed people or things) containing ( In … ) ENT(species of tree-like people whose leader was Treebeard, in J.R.R. Tolkein’s fantasy, The Lord of the Rings).
Austere existence is seen among cats at war with mice (10)
Husband in jeopardy back in times past finds pig (9)
I haven't cracked this one yet — but Fifteensquared have:
[ H(abbrev. for “husband”) contained in ( in ) reversal of ( … back ) RISK(jeopardy/danger) ] contained in ( in ) YORE(times past/long ago).
French pop excessive American consumes for entertainment (8)
I haven't cracked this one yet — but Fifteensquared have:
PÈRE(French for “father”, for which “pop” is an informal term) contained in ( … consumes ) [ OTT(abbrev. for “over the top”/excessive) + A(abbrev. for “American”) ].
Lock spring breaks giving uninvited access? (8)
Setter barking shows way (6)
2d
(and 2 Down) Drag queen's chasing buggy we hear in sitcom (6,6)
Map detail — it describes three main points (5)
I haven't cracked this one yet — but Fifteensquared have:
IT containing ( describes ) N,S,E(abbrev. for , respectively, “north, south, east”, three main compass points).
Wrongdoer renouncing evil without real worth (4)
I haven't cracked this one yet — but Fifteensquared have:
“villain”(wrongdoer/a criminal) minus ( renouncing ) “ill”(evil/harm).
Type letters or click words in the clue