Remove dairy produce before getting exasperated (7,3)
I believe the answer is:
cheesed off
I believe this clue is a double definition.
'remove dairy produce before' is the first definition.
(remove = off, dairy = cheese, before = past tense)
'getting exasperated' is the second definition.
(Other definitions for cheesed off that I've seen before include "Bored" , "frustrated" , "Not at all happy" , "Cross" , "Unhappy" .)