1: Most moving parts of rivers add estuaries (7)
4: Wine from Greece brought back in canisters (7)
7: Clearances for the first couple of characters to find answers. (11)
10: Anger that is constraining response (3)
12: Curing bad meat in English river (9)
13: Property initially in annuity settlement survived estate tax (5)
14: Greek characters suggest dawn (3)
15: Be prepared with amnesties for truancy (11)
17: Hostile warning: one man has captured the queen (11)
20: Crook skimmed cash register? (3)
21: Loathing for leader leaving platform (5)
23: A changing sort of forced labour (5-4)
25: Implement box for young cat (3)
26: Big flowers for VIPs? (4,7)
27: In text of bill, I cited 'It's not legal' (7)
28: Queen is gaga for horses (7)