Viking-battling king (6)

I believe the answer is:

alfred

(Other definitions for alfred that I've seen before include "A great king of Wessex, d. 899" , "Ninth century king of Wessex" , "... the Great, 9th-century Anglo-Saxon king" , "King after Ethelred" , "Great English king" .)

I've seen this clue in The Times.

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