Evil, malevolent (6)
I believe the answer is:
malign
This clue is a double definition.
'evil' is the first definition.
(I know that evil can be written as malign)
'malevolent' is the second definition.
(I know that malevolent can be written as malign)
(Other definitions for malign that I've seen before include "run down" , "Evil, malevolent" , "Evil, baleful" , "Wicked, evil" , "Speak ill of (someone)" .)