Legendary king of the Britons (6)

I believe the answer is:

arthur

'legendary king of the britons' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for arthur that I've seen before include "Camelot's king" , "Legendary king of Camelot." , "Owner of Excalibur" , "Dudley Moore film" , "Husband of Guinevere" .)

I've seen this clue in The Independent.

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