Fizzy drink son or daughter accepts for starters (4)
I believe the answer is:
soda
'fizzy drink' is the definition.
(I've seen this before)
'son or daughter accepts for starters' is the wordplay.
'for starters' says to take the initial letters.
The first letters of 'son or daughter accepts' is 'SODA'.
(Other definitions for soda that I've seen before include "Splash served with some spirits" , "Type of bread, water or fountain" , "Drink containing carbonated water and sometimes flavouring" , "Alkaline substance used in cleaning, drinks etc" , "pressurised liquid" .)