A game insect? (7)
I believe the answer is:
cricket
This clue is a double definition.
'a game' is the first definition.
(cricket is a kind of game)
'insect?' is the second definition.
(cricket is a kind of insect)
(Other definitions for cricket that I've seen before include "English game or chirping insect" , "Insect - sport" , "Six-footer" , "Ball game" , "short leg seen on this field?" .)