Foe of the Roman Empire (6)

I believe the answer is:

attila

(Other definitions for attila that I've seen before include "Warrior" , "Fifth century king of the Huns" , "King of the Huns, d. 453" , "A very great Hun of old" , "5th century king of the Huns who sacked Rome" .)

I've seen this clue in The New York Times.

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