Small bother returning non-alcoholic fizz (4)
I believe the answer is:
soda
'non-alcoholic fizz' is the definition.
'soda' can be an answer for 'fizz' (I've seen this before). I am unsure of the 'non-alcoholic' bit.
'small bother returning' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'bother' becomes 'ado' (both can mean fuss or commotion).
'returning' says the letters should be written in reverse.
'ado' backwards is 'oda'.
's'+'oda'='SODA'
Can you help me to learn more?
(Other definitions for soda that I've seen before include "Accompaniment to whisky" , "Alkaline substance used in cleaning, drinks etc" , "Fizzy water, goes well with whiskey" , "Sodium carbonate" , "for use with whisky?" .)