1: Behind and down and out (3)
3: Trashy dime novel about American sex symbol who's not all there? (5,2,4)
9: May voyage a spell (7)
10: Headlight providing well-to-do person a start for high level flight (7)
11: Plan to return with woman (3)
12: Crook skimmed cash register? (3)
14: North African port with more flavour (7)
15: First of all, you undercooked my meat; I enjoy roast more flavorful (7)
16: Dangle South American flags halfway (7)
18: Unidentified street across the Mountains (7)
20: Starting off, bent charm (7)
23: Original caliph adds brave face to UK/Arab struggle (3-4)
26: Root for mounting might (3)
27: Tweak with wrong end of a pin (3)
28: Sheds last one carelessly (4-3)
29: Make mistake with a check, largely irregular (7)
30: Western retreat satisfactory, accepted by canoeists and surfers? (3,8)
31: Beauty stripping top and bottom is an additional feature (3)