Across
1. Trains nipper at being cast into stinking pit's chemical treatment (14)
10. Numbers points for climbers (5)
11. Armstrong and I grab articles for state (9)
12. Closes heart, or is about to? (15)
13. Said lunatic frees pods (9)
15. John, a blues singer, not right in hard rock (5)
17. Tone's wrong for a start (5)
18. Harbour died after I was removed, soaked (9)
19. Excuse bombing at a rail into Zion (15)
22. Scotch (which is not English) with ice, lazing about (9)
23. In India, the right to replace one's God (5)
24. Choose least odds in fixing, so the change is superficial (14)