Tennis star Agassi (5)
I believe the answer is:
andre
'tennis star 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, conductor" , "French boy's name" , "Name of pianist" , "Peter --, singer" , "Pop singer and reality TV star" .)