Drink not supplied promptly, taking extra time (5)

I believe the answer is:

latte

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'drink' is the definition.
(type of coffee drink)

I can't explain the remainder of the clue.

(Other definitions for latte that I've seen before include "Italian word for milk" , "Type of coffee" , "hot drink" , "See 21" , "Style of coffee" .)

I've seen this clue in The Guardian.

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