Deviously clever (4)
I believe the answer is:
wily
(Other definitions for wily that I've seen before include "Deceptively clever" , "'Crafty, cunning (4)'" , "Fly" , "Shrewd" , "Cunning; foxy" .)
I believe the answer is:
wily
(Other definitions for wily that I've seen before include "Deceptively clever" , "'Crafty, cunning (4)'" , "Fly" , "Shrewd" , "Cunning; foxy" .)