1: One of the Marx brothers making a comeback as talk show host (5)
2: Going after the final piece of puzzle for a very long time (3)
3: Steel is ruined, nearly destroyed (5)
4: Something good made by dwarf barber, perhaps! (6,7)
5: Shocked ensemble leader with ascending note during concert (9)
6: Poor year after Eden lost (5)
8: Diet, sir! Clergy upset with fat constituents (13)
10: Cleaning off a lion bust (9)
12: Large strumpets turned a trick? (9)
14: Standard style of music rejected (3)
15: Bra is super as container for wine (9)
17: Agree to make Lucifer wicked? (3)
20: Several loads hide in Scotland (5)
21: Bury with arms and legs but no head (5)
22: Discounting all odds, teen assured to succeed (5)
25: What this puzzle is (3)