Game, by Jiminy! (7)
I believe the answer is:
cricket
'game' is the definition.
(cricket is a kind of game)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for cricket that I've seen before include "Summer sport" , "Jumping insect" , "little creature" , "Ball game" , "Game - "basically baseball on Valium" (Robin Williams)" .)