Apt anagram of "evil” (4)
I believe the answer is:
vile
'apt anagram of evil' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for vile that I've seen before include "Base" , "Abominable" , "Evil - evil (anag)" , "Disgusting, quite evil" , "Noxious" .)