Therefore they were brought up to be a monster (4)

I believe the answer is:

ogre

I'm a little stuck... Click here to teach me more about this clue!

'be a monster' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for ogre that I've seen before include "Giant of folklore who ate humans" , "The giant is some goer" , "stern one who inspires fear" , "Monstrous person" , "Cruel and wicked person" .)

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app