It’s a top game (7)
I believe the answer is:
diabolo
This clue is a double definition.
'it's a top' is the first definition.
(I've seen this before)
'game' is the second definition.
(I've seen this before)
(Other definitions for diabolo that I've seen before include "O, bad oil is used in this game with top and sticks" , "Top-on-a-string game" , "Game involving two sticks joined by a string and a spool-shaped object" , "juggling performance?" , "Game of catching spinning-top" .)