Across
9a
Musical snob on convoluted reason cover can be discounted? (2-6,5)
See 8
Joke about northern band (4)
Ultimately filing last of criminal charges quickest – also most horrific (10)
I haven't cracked this one yet — but Fifteensquared have:
[filin]G + [crimina]L in HASTIEST
Deal maybe when doctor gets into row (6)
Democrat First Lady meeting hacks and pioneers (8)
Cool vision for childhood (7)
Mean to change a flower (7)
Order passbooks in two parts – no trouble (8)
Come cycling around side part of America (6)
I haven't cracked this one yet — but Fifteensquared have:
XI (e.g. a footbal side) in COME with the letters “cycled” by two positions
Brothers promise to carry occasionally handy weapon (10)
I haven't cracked this one yet — but Fifteensquared have:
Alternate letters of hAnDy in BROS WORD
Wife having new zip to open dress (4)
I haven't cracked this one yet — but Fifteensquared have:
GO (energy, zip) + W[ife] + N[ew]
28a
Life in disarray with San Diego's capital invested in somewhere medics are fatigued? (5,8)
See 27
Down
Contribution from people supporting party (8)
Labour flagging striking victory (4)
I haven't cracked this one yet — but Fifteensquared have:
SLOWING less WIN
Some sampling errors remain (6)
Is left with son for Christmas and Easter, say (7)
I haven't cracked this one yet — but Fifteensquared have:
IS + L + AND (with) + S[on]
Touch instrument on the counter (4)
Disappointment as I discovered wild Manx cat roaming (10)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of I + [w]IL[d] + MANX CAT
Finishes as Aussies stumps regularly taken out (4,2)
I haven't cracked this one yet — but Fifteensquared have:
Alternate letters of aUsSiEs StUmPs
Harry Ramsden with ban for Hellmann's and Heinz, say (5,5)
Just seconds in every car and truck (3)
I haven't cracked this one yet — but Fifteensquared have:
The second letters in eVery cAr aNd
Sign something Trump brings to the table? (3)
Drink with Don to build ties, say (8)
Decline America's cup (7)
Deprived of hat to cover Frenchman's head (6)
I haven't cracked this one yet — but Fifteensquared have:
F[renchman] in BERET
Fashionable second course (6)
Turf accountant's first drink (4)
Good, clear framework (4)
Type letters or click words in the clue