A monster spiller of gore (4)

I believe the answer is:

ogre

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

'a monster' is the definition.
(fairy tale monster)

'spiller of gore' is the wordplay.
'gore' can be anagrammed to 'OGRE'.
However, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for ogre that I've seen before include "Monster, troll" , "Wicked and inhuman person" , "Wicked giant" , "Human-eating giant" , "terrible person" .)

I've seen this clue in The Globe and Mail.

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