The most common and most likely answer to this crossword clue is the 10 letter word BASKETBALL
I've seen this crossword clue in The Guardian
B
A
S
K
E
T
B
A
L
L
More clues leading to the result BASKETBALL
- Game to enjoy before first couple from Etruria dance
- Takes rum into bachelor party for game
- Kebab stall prepared game
- Warm yourself before ballet movement, a competitive activity
- Question everyone about complicated bet after British game
- Wager involving question put to everyone after British game
- It involves dunking first of biscuits in lounge and others closer to hall
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 = basketball.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 BASKETBALL mean?
BASKETBALL noun- A sport in which two opposing teams of five players strive to put a ball through a hoop.
- The particular kind of ball used in the sport of basketball.