Winner, champion (6)
I believe the answer is:
victor
I believe this is a double definition.
'winner' is the first definition.
(I know that winner can be written as victor)
'champion' is the second definition.
(I've seen this in another clue)
(Other definitions for victor that I've seen before include "winning player" , "The . . . . . . comic with Alf Tupper" , "Champion" , "Winning contestant" , "Winner; boy's name" .)