Cryptic crossword No 3,447

Across

1. After work, I almost dreamt up warped reason for war in China? (5,5)
2. Where most handwriting is, in theory (2,5)
3. Originally thought up bait and switch — they're not the top 26a (5)
4. Measure of size is a little submissive (1,1,1)
5. See 2d
6. See 2d
7. Danish physicist and his nobler careers (5,4)
8. Emitting gas in South London (7)
9. Hurried mother initially labelled the GOAT, for one (6,6)
10. Might a piece of this fish be used as tackle? (3)
11. Leaderless change has space for people from Colorado (3,6)
12. Essentially, Helen acts morose to find new music (7)
13. Metal underwear extremely salacious (5)
14. Small butcher putting note out front — it could be arousing (10)

Down

1. Peers might go dis way, we hear... farewell! (6-2)
2. Playful time with consort, where you might find 16d (5,6)
3. See 1d
4. Portion of mint, salt, anise on the counter, finally (2,4)
5. Confessing to letting someone in? (9)
6. See 23d
7. State mother starts to luxuriate in (4)
8. Pinkish chairs furthest from the stage, for audience in America (4)
9. Deep asleep, like gay fans of Dracula? (3,3,3,5)
10. Aunty's role is working in open air, perhaps? (6,7,12)
11. Examination of dead letters with spy chief on returning train (10)
12. Symptom of tinnitus for studs? (8)
13. Cadet aims poorly, it might be a long shot? (9)
14. Equally sea-worthy and open to attack (10)
15. What's at the heart of narrow time off from work? (1,3,1)
16. As if my leg's being pulled (1,5,2)