Drink like this with US prosecutor (4)
I believe the answer is:
soda
'drink' is the definition.
(I know that soda is a type of non-alcoholic beverage)
'like this with us prosecutor' is the wordplay.
'like this' becomes 'so' ('like so').
'with' is a charade indicator (letters next to each other).
'us prosecutor' becomes 'da' (district attorney).
'so'+'da'='SODA'
(Other definitions for soda that I've seen before include "Fizzy drink - chemical compound" , "Drink containing carbonated water and sometimes flavouring" , "Fizzy water, goes well with whiskey" , ""Splashed" drinks mixer" , "Variety of pop" .)