Tennis great Chris (5)
I believe the answer is:
evert
'tennis great chris' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for evert that I've seen before include "Chris - - (women's tennis)" , "Turn inside out (biol.)" , "Chris --, female tennis star" , "Hitter of 6 [TENNIS BALL]" , "arrange to have the wrong side out?" .)