First game of the season (6)
I believe the answer is:
opener
'first game of the season' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for opener that I've seen before include "player, first to bat" , "man, first at the crease?" , "Batsman; kitchen utensil" , "First batsman in game" , "cricketer receiving the first ball?" .)