Puzzle, bewilder (7)
I believe the answer is:
perplex
This clue is a double definition.
'puzzle' is the first definition.
(I know that puzzle can be written as perplex)
'bewilder' is the second definition.
(I know that bewilder can be written as perplex)
(Other definitions for perplex that I've seen before include "Baffle, puzzle" , "Bewilder" , "Baffle, flummox" , "Puzzle and confuse" , "Make (someone) baffled" .)