1: Sad, sad strands of Gershwin tunes, for instance (9)
5: Mrs Schmidt's penny is fake (5)
8: Trying restful turns around ship (9)
10: Airborne without a trace of fear, reclining in plane (5)
11: Sent one page rewritten in military lingo (11)
12: In no state to contain a pregnant virgin? (3)
13: Agree to make Lucifer wicked? (3)
16: Encourage horse led with direction. (3)
17: Call for help oddly stops (3)
18: Studio sign initially obscured by swirling rain (2,3)
19: However, you expect trouble at first (3)
20: Crew member is one in operating room (3)
21: Does the wandering hero duly hostess perplex? (7)
23: Roosevelt's undergarment? (5)
24: Total lack of enthusiasm for girlishness in Scotland? (9)
26: Englishman opening a can to dine at home (3,2)
27: Gang has finished chasing one left alone (9)