Sportsman and artist turned singer (6)
I believe the answer is:
archer
'sportsman' is the definition.
(I know that archer is a type of sportsman)
'artist turned singer' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'turned' says the letters should be written backwards.
'singer' becomes 'cher' (American singer).
'ra' back-to-front is 'ar'.
'ar'+'cher'='ARCHER'
'and' acts as a link.
(Other definitions for archer that I've seen before include "old jockey" , "Jeffrey --, writer" , "A 19 lord - old soldier" , "User of bows and arrows" , "One uses bow and 30ac" .)