Monster slain by Beowulf (7)

I believe the answer is:

grendel

'monster slain by beowulf' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for grendel that I've seen before include "Monster slain by 1 ac" , "sea-monster" , "Old English monster" .)

I've seen this clue in The Times.

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