Drink greedily (4)

I think it could be either:

Which length description are you looking for?:

gulp

'drink greedily' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for gulp that I've seen before include "Noise made when swallowing too quickly" , "Swallow hurriedly" , "Swallow in large mouthfuls" , "Swallow audibly" , "Audible swallow" .)

I've seen this clue in The Sun.

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