Monster of popular legend (4)

I believe the answer is:

ogre

(Other definitions for ogre that I've seen before include "Wicked and inhuman person" , "Terrifying man" , "terrible person" , "character in 'Puss in Boots'" , "Terrifying giant" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.