Fed up working in the dairy? (7,3)
I believe the answer is:
cheesed off
'fed up' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for cheesed off that I've seen before include "Unhappy" , "Cross" , "Not at all happy" , "Fed up, disgruntled" , "Bored" .)