CRYPTIC CROSSWORD No. 16,529

ACROSS:

9 Surmount. 1 Pipe 10 rack. Public. 5 Tropic. 12 Onyx. 13 Archdeacon. 15 April Fools’ day. 19 Spine-tingling. 23 Los Angeles. 25 Envy. 28 Tripod. 29 Alphabet. 30 Des res. 31 Snuffbox.

DOWN: 1 Piston. 2 Party. 3 Rood. 4 Central. 6 Rouge. 7 Police dog. 8 Cockneys. 11 Shoo. 14 True. 15 Amidships. 16 Fan. 17 Laid. 18 Isolated. 20 Item. 21 Gremlin. 22 Syntax. 24 Noose. 26 Nabob. 27 Chef.