1: Impostor made flanking attack (5)
4: One pointer concerning appetizer assortment (9)
9: Hero-worshipper dancing reel and jig (7)
10: Fix the oil platform ... (3)
11: Bounder beheaded by slippery swimmer (3)
12: Draw a stomach uprising (3)
13: Okay shot ripped tears in butt (6-5)
15: Capture ten heading north (3)
16: A properly run lottery might be a complete success (1,5,5)
20: Bright-sounding agenda touches on heavyweight legend (5,6)
21: Sheep to start wallowing in ease (3)
22: Exchange concealed proprietary knowledge (5,6)
25: Arcking shot from Bill O'Brien (3)
27: Frost to cover the cake (3)
28: One embracing a lover with a little pizzazz (7)
29: Dairy stock entails wrangling around 2000 (9)
30: Course left out of Texas city's comeback (5)