Singular fuss about providing drink (4)
I believe the answer is:
soda
'drink' is the definition.
(soda is a kind of drink)
'singular fuss about' is the wordplay.
'singular' becomes 's' (abbreviation in grammar).
'fuss' becomes 'ado' (synonyms).
'about' says the letters should be written in reverse.
'ado' reversed gives 'oda'.
's'+'oda'='SODA'
'providing' is the link.
(Other definitions for soda that I've seen before include ""Splashed" drinks mixer" , "Accompaniment to whisky" , "Drink containing carbonated water and sometimes flavouring" , "Fizzy drink - chemical compound" , "Variety of pop" .)