1: Prohibit fanatics grabbing British records showing checks and balances? (9)
5: This is always resplendent, adorning heads (5)
7: Teen unclothes poorly dressed diners (13)
10: Note old fashioned opening with 2.54 cm bird (9)
13: Its strange to go back to a novice for a wall decoration (5)
15: Discussed one who broadcasts mistake (5)
16: Boggy terrain didn't sink Plan C's successor? (9)
18: Model unusually creepy hat (9)
19: Between them, both sides have time for a drink. (5)
20: Faith in Osiris, lamentably (5)
21: Fears ultimately uncentered and pointless (9)
22: 'Ransom'? Lame. Run 'Rocky I', 'II', 'III', etc. (5,8)
26: Inspect gold dust without refining initially (5)
27: Segregate horses around the object of a hunt (6,3)