Time for both sides to grab beer (5)
I believe the answer is:
lager
'beer' is the definition.
(type of beer)
'time for both sides to grab' is the wordplay.
'time for' becomes 'age' (I've seen this in other clues).
'both sides' becomes 'LR' (abbreviation for left and right).
'to grab' means one lot of letters goes inside another.
'age' placed inside 'lr' is 'LAGER'.
(Other definitions for lager that I've seen before include "The drink could be regal" , "Regal kind of beer" , "Light beer needed" , "light ale" , "drink in the bar?" .)