Fountain fare (4)
I believe the answer is:
soda
'fountain fare' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for soda that I've seen before include "Drink containing carbonated water and sometimes flavouring" , "Variety of pop" , "Splash served with some spirits" , "pressurised liquid" , "fizz" .)