1: Interstate trade is best (5)
4: Certainly not breaking many bones (2,2,5)
8: Quietly pulls electrical connectors (5)
9: Shipper holds stylus for woodworker (9)
11: A properly run lottery might be a complete success (1,5,5)
13: Feeling threatened, suggested concealing identity (11)
15: Toothpaste brand at Target? (3)
17: God! Get real! There's no point getting upset (3)
18: Support sign for subordinates (11)
21: Boob implant cups: sad hoax in line with 15-down (8,3)
23: Partly indicates progress of undergraduate (2,1,6)
25: Shy away from women's clothing (5)
26: Wild rim shot is unpredictable (3-2-4)
27: Feeling produced by tease 'n' sex (5)