1: Unfallen in gradual encirclement of city! (9)
2: Identifies men as displaced - best not to be one at 34's (5)
3: Polygraph unexpectedly traps vandal (3)
4: Bystanders are ready to see Queens (9)
5: Improve me back end (5)
6: Rejecting crew's work on board, you rest at the stern (8,3)
7: Navigate by terse directions (5)
8: Johnston's desires (5)
13: Hostile warning: one man has captured the queen (11)
15: Take Chair in university (3)
16: First popular promise - extreme appeal (9)
17: Man, what an avant-garde US artist! (3)
18: Leaving no trail, Penny and Les hid in the middle of Sussex (9)
21: Indian leader raising primitive bird (5)
22: The percolator, repulsively, contains a pancake (5)
23: Lodge heard discharge (5)
24: Assistants' crackpot ideas (5)
28: Bend in the middle and wind back (3)