Fellow player (4-4)
'fellow player' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for team-mate that I've seen before include "Sporting ally" , "Fellow competitor" .)
'fellow player' is the definition.
(I've seen this before)
This is all the clue.
(Another definition for teammate that I've seen is " fellow player".)