Infatuation at the party? (5)

I believe the answer is:

crush

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'infatuation' is the definition.
(synonyms)

I don't understand the remainder of the clue.

(Other definitions for crush that I've seen before include "Intense infatuation; pressing crowd" , "Close crowd; drink" , "Fruit drink; crowd" , "Deform; violently subdue (rebellion)" , "Close crowd of people" .)

I've seen this clue in the Evening Standard.

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