Felon, malefactor (8)
I believe the answer is:
criminal
This clue is a double definition.
'felon' is the first definition.
(I know that felon can be written as criminal)
'malefactor' is the second definition.
(I've seen this in another clue)
(Other definitions for criminal that I've seen before include "Felon, malefactor" , "Violating the law" , "Wrongdoer" , "Deplorable, shocking" , "Felon, lawbreaker" .)