Drink loads in closing bars (5,4)
I believe the answer is:
cream soda
'drink' is the definition.
(I've seen this before)
'loads in closing bars' is the wordplay.
'loads' becomes 'reams' (I've seen this in another clue).
'in' indicates putting letters inside.
'closing bars' becomes 'coda' (I've seen this in another clue).
'reams' placed within 'coda' is 'CREAM SODA'.
(Other definitions for cream soda that I've seen before include "Sparkling stuff" , "Vanilla-flavoured fizzy drink" , "Vanilla-flavoured pop" , "Carbonated soft drink" .)