1: Deliver a sweetener to mix with your date? (5,4,4)
2: For slimmers: food almost tasteless, initially, and costing nothing? (3-4)
3: Sickens up, reels with disgust (7)
4: Tarka beheads scoundrel (5)
5: Belonging to you, is getting to me, Herb (5)
6: Banker maintains a Greek swimmer (7)
8: Thoughtful former spouse leaves, dear (7)
10: The man with lack of skill shows cruelty (13)
15: Loathes key English exams (7)
17: To fascinate a disagreeable female we turned in (7)
18: Against that terrible, consuming war (7)
20: Canoe lost in sea (5)
21: Wild rose engulfs one willow (5)