The most common and most likely answer to this crossword clue is the 5 plus 4 letter word BOARD GAME
I've seen this crossword clue in The Guardian
B
O
A
R
D
G
A
M
E
More clues leading to the result BOARD GAME
- Risk perhaps sounding fed up and ready for anything new
- Go for one day keeping apart swine and pheasant, say
- Directors, having willingness to act, go for one
- Diversion — you’ll need to mount up for it
- Could love in Shakespeare’s play be trivial pursuit?
- Draughts, perhaps, made bar go uncomfortable
- Monopoly? Directors willing to participate?
- Monopoly or chess at the table. Ready?
Buddy explains!
The straight part
We know that "Diversion" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case diversion = board game.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.