Suggestive of evil (8)
I believe the answer is:
sinister
'suggestive of evil' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sinister that I've seen before include "Resist in way that is creepy" , "Threatening - ominous" , "Disturbing" , "Threatening; evil-looking" , "Suggestive of evil, being lefthanded" .)