Flesh-eating giant's horrendous gore (4)

I believe the answer is:

ogre

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'flesh-eating giant's' is the definition.
(I've seen this in another clue)

'horrendous gore' is the wordplay.
'gore' anagrams to 'OGRE'.
But, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for ogre that I've seen before include "Fairy-tale creature" , "Wicked giant" , "Evil giant" , "Cruel, fearsome person" , "Giant of folklore, eats humans" .)

I've seen this clue in The Sun.

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