2. boulder and alien headed for outer space (6)
8. dart through a bottleneck with no direction (5)
9. UNCLE'S arch enemy (6)
10. a small measure of shell make up this bird (9)
13. mythical creature with a zip fastening (9)
15. its a shame to ruin this confused bird (5,6)
16. returned your call after thunder in the east (9)
18. the weed-lover might be found joyful in nettles (6)
21. head south immediately to the party, or you'll be cold (8)