A drink from Cupid? (3)

I believe the answer is:

cup

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'a drink' is the definition.
(a cup of drink)

I cannot understand how the rest of the clue works.

(Other definitions for cup that I've seen before include "Trophy, drink" , "Chalice; trophy" , "Sort of cake" , "competition" , "McCarthy, Walker or Maguire" .)

I've seen this clue in the Evening Standard.

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