Fairy tale villains (5)
I believe the answer is:
ogres
'fairy tale villains' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ogres that I've seen before include "huge figures" , "Fairytale giants" , "She-giant of fairy tale" , "Awful brutes" , "Formidable people" .)