1: Piano finale not determined (7)
2: Backsliding, Pa reels drunkenly (7)
3: Finally nuts, Im crazy for cow (9)
4: Sort of uninitiated cheat (3)
5: Force of nature, like Chubby Checker (7)
6: Big Bird: 'Apologies--getting a late start' (5)
7: Concerning Eliza undergoing transformation for profit (7)
10: Vapour in the street the final morning (5)
12: Anger that is constraining response (3)
14: Sober Tibetans losing control, taking a little nip (9)
16: Helps for a short time (7)
17: Monster devouring head of old mounted soldier (7)
18: Clear initial rubbish in drain (3)
19: Some Oriental craft for old U.S. President Eric (7)
20: A monster making some angry phone-calls (7)
22: Messages transmitted about a mile (1-4)
24: You audibly ram partner (3)