Fusses about drink (4)
I believe the answer is:
soda
'drink' is the definition.
(soda is a kind of drink)
'fusses about' is the wordplay.
'fusses' becomes 'ados' ('ado' can be a synonym of 'fuss').
'about' says the letters should be written backwards.
'ados' written backwards gives 'SODA'.
(Other definitions for soda that I've seen before include "Drink containing carbonated water and sometimes flavouring" , "Alkaline substance used in cleaning, drinks etc" , "for use with whisky?" , "fizz" , "Fizzy water, goes well with whiskey" .)