Crossword Genius

Monstrous giant's head bagged by hero is hideous (7)

Ross

I believe the answer is:

ogreish

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

'monstrous' is the definition.
(I've seen this before)

'giant's head bagged by hero is hideous' is the wordplay.
I cannot quite understand how this works, but
'is' is within the answer.
'giant' could be 'ogre' (ogre is a kind of giant) and 'ogre' is located in the answer.
A single letter 'h' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for ogreish that I've seen before include "Like a cruel monster" , "Monstrous, misshapen, cruel" , "Ugly" , "Looking like a fiend" , "Fearsome" .)

I've seen this clue in The Telegraph.
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