Tennis great Arthur (4)
I believe the answer is:
ashe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tennis great arthur</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ashe that I've seen before include "Sporting champion once" , "US tennis player Arthur, 1975 Wimbledon champion" , "Arthur, who came to court" , "US rallying champion" , "US court star" .)