Crossword Genius

Odd cardinal has funny ideas for a game (4-1-4)

Ross

I believe the answer is:

five-a-side

'a game' is the definition.
(five-a-side football)

'odd cardinal has funny ideas' is the wordplay.
'odd cardinal' becomes 'five' (an odd cardinal number).
'has' indicates putting letters inside.
'funny' is an anagram indicator.
'ideas' with letters rearranged gives 'easid'.
'five' placed around 'easid' is 'FIVE-A-SIDE'.

'for' is the link.

(Another definition for five-a-side that I've seen is " sport".)

I've seen this clue in The Guardian.
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