Mean creature (4)
I believe the answer is:
ogre
'mean creature' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ogre that I've seen before include "Wicked and inhuman person" , "Giant of folklore who liked to eat humans" , "Cruel and wicked person" , "Terrifying monster" , "character in 'Puss in Boots'" .)