Unscrupulous tennis player? (9)
I believe the answer is:
racketeer
'tennis player?' is the definition.
(I know that tennis player can be written as racketeer)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for racketeer that I've seen before include "tennis player?" , "fraudster" , "Crook" , "Wide boy" , "Mafia-type" .)