Cryptic crossword No 2,369

Across

1. Whip-round gives you more than enough to get something considered good (3)
2. How, periodically, soils and rocks are newly formed: in-class project? (10)
3. Ace fighter pilot summoned by King (5)
4. Theatre and music, say, captivates lad and is firing their interest (9)
5. Harassment – not the first time government cuts agricultural aid (10)
6. Avoid ejaculating over backing singer (4)
7. Vocally petitions religious types (5)
8. Endemic illness originally treated with antibiotics? (8)
9. Throwing away recipe – cross, somewhat gutted, and most resentful (8)
10. Half-heartedly shout downstairs (5)
11. Ex-postie might have got it for taking people's parcels? (4)
12. Removal of waste from an international drilling base (10)
13. One bike manufacturer, cycling guru's business? (9)
14. Mediterranean island announced possible results of infrastructure investment (5)
15. Atrocious weather's seen on Friday; it's like being in a river (10)
16. Noodles oddly falling in lines (3)

Down

1. Social club I organised under pressure (6)
2. Edict presented by Lord Erskine (5)
3. Vigorously hugs tourist's waist, in typically Gallic gesture (5)
4. Erica's outside Centre for Psychological Wellbeing (6)
5. Restless herons gathering round, towards the coast (7)
6. Drink we must drink at home (4)
7. One who scored from cross, initially (7)
8. Naked Tesco assistant on the counter – ultimately one to avoid (6)
9. Extremely illogical side of Spock's character (3)
10. Failing to grip tightly (4)
11. Old man having a drop of sherry before bath (3)
12. Revolutionary scientific body: what's next in line? (4)
13. Underlay, maybe made out of 50% polystyrene at its core (3)
14. Strange amphibian with no tail (3)
15. Awfully messy at last night's practice (6)
16. Product for hair, bubbly clear liquid, essentially (7)
17. Accommodation's pricier if you want it close to Christmas, we've discovered – fair game? (3,4)
18. Ration books left in the van (3)
19. The exhausted grunts returned to protect Navy Seal (6)
20. Fashionable emporium's opening up on southern Paris's equivalent of The Strand (6)
21. Rack bearing emperor's clothes? (5)
22. Over a hundred objections for starters, papers state (5)
23. Move from place to place in Portugal, riding donkey (4)