Across
A scream from hospital colleague? (7)
Cowboy film actress? (7)
Notes exactly as quoted by Greek character (5)
Vacuous really, there’s McGonagall’s initial, shocking versifier (9)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (shocking) of R[eall]Y + THERE’S + M[cgonagall) (‘shocking versifier’ – see here and here ‘s his famously egregious poem – my husband was a Dundonian and he would have loved this one, as I did
Auntie introducing brother-in-law, bighead in two minds? (10)
I haven't cracked this one yet — but Fifteensquared have:
BEEB (Auntie – both slang for the BBC) + BRO (brother) in LEX (law) for the character from The Hitch -hiker’s guide
Branch in tree cut down with blade, originally (4)
If for film, almost all of the data falsified (8,4)
Flighty type introducing bishop to area of jazz? (12)
I haven't cracked this one yet — but Fifteensquared have:
B (bishop) in SCAT TERRAIN (area of jazz) – I liked the construction and the surface
Review of current depravity (4)
Pretty essential publishing material in backward filthy gossip – OK for Rupert Murdoch? (4,6)
I haven't cracked this one yet — but Fifteensquared have:
FAIR (pretty) + INK (essential publishing material) in a reversal (backward) of MUD (filthy gossip) – this was definitely a favourite
European part of 23 down in reversible collars (9)
I haven't cracked this one yet — but Fifteensquared have:
OVEN (part of range – answer to 23 down) in a reverse of NAILS (collars)
Complete trash (5)
Winger heading for Everton put on Liverpool strip, say? (3,4)
I haven't cracked this one yet — but Fifteensquared have:
RED KIT (Liverpool strip, say) + E[verton] – super surface
Blunted article buried in prehistoric material (7)
Down
Get right hand of bride held by groom: marry finally (4,2)
I haven't cracked this one yet — but Fifteensquared have:
E (right hand of [brid]E in COMB (groom) + [marr]Y
See 24
Slow jerks are elected (10)
Partial uprooting of baobab, or a Christmas tree (5)
Robin flying by, one word for it? (3,6)
Number of Germans committed perjury (4)
26 wrong – or not? (8)
One held by cocktail stick on island, Micronesian nation (8)
Distribute five-hundred little daisy chains (10)
I haven't cracked this one yet — but Fifteensquared have:
D (five hundred) + MINI (little) in (chained by) ASTER (daisy) – nice surface
Handy lever I used, with day for installation (9)
I haven't cracked this one yet — but Fifteensquared have:
SAT (day) in an anagram (used) of LEVER I
A sibilant sound interrupted by conclusion of magistrate or judge (8)
I haven't cracked this one yet — but Fifteensquared have:
A SSSS (sibilant sound) round [magistrat]E + OR
Parent supported by doctor, withering flower (8)
Rough seas at first on boat (6)
Yes, I’m cheerful ultimately – that represented? (6)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (represented) of YES I’M + [cheerfu]L – and a smiley represents cheerfulness
Called ‘scope’, basically – is it? (5)
I haven't cracked this one yet — but Fifteensquared have:
RANG (called) + [scop]E (‘basically’) – the definition is ‘scope’ but I can’t quite get my head round expressing it
2d
Fool to admit stupid, a powerful thinker (4,6)
Type letters or click words in the clue