Malefactor, villain (8)
I believe the answer is:
evildoer
I believe this clue is a double definition.
'malefactor' is the first definition.
(I've seen this before)
'villain' is the second definition.
(thesaurus)
(Other definitions for evildoer that I've seen before include "One committing wicked deeds" , "Malefactor" , "sinner" , "'baddie'?" , "Wicked person" .)