1: Fix the oil platform ... (3)
8: Does the wandering hero duly hostess perplex? (7)
10: About....about right? Wrong! (3)
11: Pronounced ability to smell negative votes (3)
13: Exchange concealed proprietary knowledge (5,6)
15: Float, drifting, in the air (5)
17: Mountain gorilla captivated Scientific American (9)
19: Call on stranger, then elope (9)
22: Spanish wine from a city in Brazil getting German approval (5)
23: Sent one page rewritten in military lingo (11)
25: Drongo lacks even a pet (3)
26: Concealed hot part of psyche (3)
28: Inept casino confused the issue (4,2,5)
30: Western retreat satisfactory, accepted by canoeists and surfers? (3,8)
31: In the manner of a girl (3)