Arthur __, a 1975 Wimbledon champion (4)
I believe the answer is:
ashe
(Other definitions for ashe that I've seen before include "Former tennis star" , "He was good enough to win Wimbledon" , "US court star" , "Arthur, first black Wimbledon men's singles champion, 1975" , "US tennis player Arthur, 1975 Wimbledon champion" .)