Tennis great Agassi (5)
I believe the answer is:
andre
'tennis great agassi' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for andre that I've seen before include "- Previn; - Gide" , "Pop singer and reality TV star" , "Gide, perhaps" , "Australian who sings" , "Peter --, singer" .)