Upset drink (5)
I believe the answer is:
shake
This clue is a double definition.
'upset' is the first definition.
(thesaurus)
'drink' is the second definition.
(shake is a kind of drink)
(Other definitions for shake that I've seen before include "rock" , "Tremble, quake" , "Tremble; milk drink" , "wave" , "Tremble, vibrate" .)