Fabled monster (4)
I believe the answer is:
ogre
'fabled monster' 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 "Cruel, fearsome person" , "Cruel and wicked person" , "One to gobble flesh" , "Fairy tale monster" , "Human-eating giant" .)