Fraudster and tennis player? (9)
I believe the answer is:
racketeer
This clue is a double definition.
'fraudster' is the first definition.
(I've seen this before)
'tennis player?' is the second definition.
(I know that tennis player can be written as racketeer)
'and' acts as a link.
(Other definitions for racketeer that I've seen before include "dishonest dealer" , "Capone, for one" , "Dodgy dealer" , "someone on the fiddle" , "Criminal trader" .)