Wine gets Katy upset about nothing (5)
I believe the answer is:
tokay
'wine' is the definition.
(Tokay is an example)
'katy upset about nothing' is the wordplay.
'upset' indicates anagramming the letters.
'about' indicates putting letters inside.
'nothing' becomes 'O' (looks like zero - 0).
'katy' with letters rearranged gives 'tkay'.
'tkay' enclosing 'o' is 'TOKAY'.
'gets' acts as a link.
(Other definitions for tokay that I've seen before include "Hungarian sweet wine" , "A wine mentioned in a national anthem" .)