1: Its a firm, small lettuce (3)
3: Mary-Jane crochets her Pop a jumper (11)
8: Britannia - she never has blanched (5)
9: Set cruise-ship for the puritan (4-5)
11: Butts in front of people, breaking drinks (5)
13: One of museums awash with cultural treasures (9)
14: Stopped? No somehow deferred (9)
16: More appealing to snub royalty? (5)
17: Look into bazooka-firing Afghanistan people (5)
19: One who administers drug treatments puts me in band at Hat Head (9)
21: Leaving no trail, Penny and Les hid in the middle of Sussex (9)
23: Lady sitting atop a bird (5)
25: Electrical units losing energy . . . and . . . and . . . (9)
27: Zealous police action captures leader of blackmailers (5)
28: Feeling threatened, suggested concealing identity (11)
29: Start reducing salt? (3)