Rounds of drinks? (4)
I believe the answer is:
laps
This clue is a double definition.
'rounds' is the first definition.
(I've seen this before)
'drinks?' is the second definition.
(lapping is a kind of drinking)
'of' acts as a link.
(Other definitions for laps that I've seen before include "Circuits of track" , "Pals doing rounds of the track" , "Drinks; circuits" , "Scoops up with the tongue" , "Circuits of a racetrack" .)