The most common and most likely answer to this crossword clue is the 7 letter word DIABOLO
I've seen this crossword clue in The Daily Telegraph
D
I
A
B
O
L
O
More clues leading to the result DIABOLO
- Top game can be the very devil
- Top game
- Game in which Diana and Jack have nothing on — look!
- Return tennis stroke with assistance before love game
- Old boy’s back stuffing face with duck and game
- Game old boy recalled in two rings
- Game over then pitch second over
- Throw hand back before over for game
- Top game features a bod I trained, see?
- Game played in parts of India and Bologna
Buddy explains!

The straight part
We know that "game" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case game = diabolo.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DIABOLO mean?
DIABOLO noun- A juggling apparatus consisting of a spool which is whirled and tossed on a string attached to handsticks.