There are some great clues in here - with my appreciation of them and a very clever/fiendish (delete as appropriate) 21ac and 6dn long delay at the end left me in SCC territory at 16 minutes. Hat off to Teazel for a good cryptic workout.
1. Fielder’s success, perhaps, an unexpected difficulty (5)
CATCH - double definition.
7. A reduction on top is clearly superior (1,3,5)
A CUT ABOVE - a reduction on top (A CUT ABOVE).
9. Scottish youngster’s brain a little affected (5)
BAIRN - anagram (a little affected - so little it’s just the R which moves) of BRAIN.
10. Slash more antiquated energy store (9)
GASHOLDER - slash (GASH), more antiquated (OLDER).
11. Company, they say, that is part of network (3)
TWO - part of ne(TWO)RK.
12. Unusual relatives with many skills (9)
VERSATILE - anagram (unusual) of RELATIVES.
14. Pet in front of a barrier heard to yowl (9)
CATERWAUL - pet (CAT) in front of a homophone (heard to) of a barrier (a wall - ER WAUL). Not seen this before but it works.
16. Newt left as lake vanishes (3)
EFT - left with lake (L) vanishing l(EFT).
18. One given discretion to let spy out of prison (4,5)
FREE AGENT - to let spy out of prison (FREE AGENT).
20. Child receiving a second slice for breakfast? (5)
TOAST - child (TOT) receiving a second (A S).
21. Characteristic of a m-mark of respect (9)
ATTRIBUTE - a (A), stuttered mark of respect (T TRIBUTE). COD.
22. That man in drink gets discharge (5)
RHEUM - that man (HE) inside drink (RUM).
1. Loaf, key element (6)
COBALT - loaf (COB - there are a lit of term for bread), key (ALT - on a keyboard).
2. Revellers’ options just before November (5,2,5)
TRICK OR TREAT - cryptic definition of this demand for sweets with menaces.
3. Good to enter royal house? It can be a headache (8)
HANGOVER - good (G) to enter royal house (HANOVER).
4. Mark on computer screen has one swearing aloud (6)
CURSOR - well, I suppose it is a mark on a screen - took me a while to see it though. Homophone (aloud) of one swearing - curser.
5. Sign of sainthood? Henry has nothing (4)
HALO - Henry (HAL) has nothing (O).
6. Man alone at the bottom in ravine (6)
GEORGE - alon(E) in ravine (GORGE). This could be a marmite clue - whilst I like marmite, I wasn’t a fan of this one.
8. Two A-levels I’d failed? A fanciful story (3,5,4)
OLD WIVES TALE - anagram (failed) of TWO ALEVELS ID.
13. Silver family of piglets, all shiny (8)
AGLITTER - silver (AG), family of piglets (LITTER).
14. Dress that’s loose at the back placed in metal container (6)
CAFTAN - at the back (AFT) inside metal container (CAN). Took some effort to prize apart this surface.
15. A meeting place in Broad Street (6)
AVENUE - a (A), meeting place (VENUE).
17. One beaten to motorway more than once (3-3)
TOM-TOM - To (TO) motorway (M) more than once (twice).
19. Like taking ends off (4)
AKIN - t(AKIN)g.