Drink like a dog (3)
I believe the answer is:
lap
'drink like a dog' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lap that I've seen before include "Drink (like dog), circuit" , "A circuit of a racecourse" , "Stage - circuit" , "Sports circuit" , "Scoop up with the tongue" .)