1 Fertiliser made by smoking dope? (6)
4 Marine sorting out a lunatic. (8)
10 Stallion's match swallows Tech beside Charles - love it or hate it!
11 Cavity in front half of crater causes infection. (7)
12 Deer at rear? (4)
13 High-spirited setter begins and ends with untidy lot set in between. (10)
15 And French prudes abandon advertising for Chopin's gems. (6)
16 Suffer defeat about deed for milk sugar. (7)
20 Wild reindeer detected in car I bought. (7)
21 Ram as Greek character? (6)
24 Yet, I describe a Himalayan snowman thus. (10)
26 Herb is a wise man? (4)
28 Plants idea in snapshots (so it's said). (7)
29 Oh I do like to be beside the dreadful disease! (7)
30 Product's key feature in taste, perhaps, causes uncertainty. (8)
31 When husky drivers drop Frenchman off, they show you to your seat. (6)