1: Slippery deck spots are on either side (9)
 2: Reptile eventually climbing a hill (5)
 3: Alien put in L.A. marriage (7)
 4: After a second, whip and rip (5)
 5: More spacious island accepted by tenant (7)
 6: Boiled the seed furiously (7)
 7: Prophecies of return of dissolute actress (9)
 8: Quick thrust giving a little nudge to sled (5)
 15: Unfit American Indian getting pale about note (9)
 16: Syria going after nurse involved in overthrow; sticky stuff? (4,5)
 18: Say again 'Others had food' (7)
 19: Larvae can appear to contain cure-all (7)
 20: A Baptist's head held by a priest in a river (7)
 21: Thoroughly go over Quattro before start of test-drive (5)
 23: Material from N.Y. - Long Island (5)
 24: The Irish are working for small clubs (5)