A game, chirpy little thing? (7)
I believe the answer is:
cricket
I believe this is a double definition.
'a game' is the first definition.
(I know that cricket is a type of ball sport)
'chirpy little thing?' is the second definition.
(the insect)
(Other definitions for cricket that I've seen before include "Insect - sport" , "Insect with long leg" , "English game or chirping insect" , "Ball game" , "Summer sport" .)