Enough for bridge? More of us playing (8)

I believe the answer is:

foursome

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'enough for bridge?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'more of us playing' is the wordplay.
'playing' is an anagram indicator.
'more'+'of'+'us'='moreofus'
'moreofus' is an anagram of 'FOURSOME'.

Can you help me to learn more?

(Other definitions for foursome that I've seen before include "In game" , "Golfing group, perhaps" , "Quartet" , "Tennis doubles players, for example" , "enough for rubber" .)

I've seen this clue in The Times.

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