Arthur ___, American tennis player who won the men's singles at Wimbledon in 1975 (4)
I believe the answer is:
ashe
(Other definitions for ashe that I've seen before include "Arthur ___, American tennis player 1943-1993" , "Arthur, first black Wimbledon men's singles champion, 1975" , "Ex-Wimbledon champ" , "Sporting champion once" , "US tennis player Arthur, 1975 Wimbledon champion" .)