1: Dogged pamphlet for the auditor (7)
2: She plays in a small enclosure on one street (7)
3: More spacious island accepted by tenant (7)
4: Changes direction with care, as befits a benefactor. (4, 4, 5)
5: Show sadness when fruit gets cut out (4,1,4)
6: Sid sets off then stops (7)
9: Princesses's attendant, yawning, laid it out (4-2-7)
13: 20-down 21-down to rush a grand relly (18)
15: Leaves mid-October accounts depleted by 50 per cent (7)
16: The most artless nearly tack on undershirt (7)
17: Senior citizen losing 500 toddlers at sea (7)
18: Perennial champs look for no upset (7)
21: Compete with life in France (3)