Stunt man challenged wickedness (9)
I believe the answer is:
daredevil
'stunt man' is the definition.
(I know that stunt man can be written as daredevil)
'challenged wickedness' is the wordplay.
'challenged' becomes 'dared' (daring is a kind of challenging).
'wickedness' becomes 'evil' (synonyms).
'dared'+'evil'='DAREDEVIL'
(Other definitions for daredevil that I've seen before include "Recklessly bold person" , "Reckless showoff" , "No cautious type" , "Dread evil, being a reckless person" , "Stuntman" .)