Like villains (4)
I believe the answer is:
evil
'like villains' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for evil that I've seen before include "Wicked - sin" , "Harmful; unlucky" , "Maleficent" , "Wicked, sinful" , "Morally objectionable behavior" .)