Activist and tennis legend Arthur (4)

I believe the answer is:

ashe

(Other definitions for ashe that I've seen before include "Arthur, first black Wimbledon men's singles champion, 1975" , "tennis champ" , "Sporting champion once" , "He was good enough to win Wimbledon" , "Ex-Wimbledon champ" .)

I've seen this clue in The Washington Post, the L.A. Times Daily and the USA Today.

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