1: Sailor seen in meager nighttime illumination (9)
2: Confer higher rank upon former adversary's first lieutenant (5)
3: Looking back inside at Rik's inimitable revealing outfit (9)
4: Sent one page rewritten in military lingo (11)
5: Squaddies took in lecture (5)
7: Eskimo intuitions are half-developed (5)
10: E.g., told story about cave-men (11)
12: Suitable position to occupy in back with revolutionary (5)
13: Starts to prepare every kind of European tea (5)
14: Wild thing sure is greediest (9)
15: Exploits, in Time, founder and glow cold (9)
17: Getting old drink in silver container (5)
18: Gripped by instrument, a longish claw (5)
20: Pygmy antelope or Nile wader without a tail (5)
21: See, you are a cad. (3)