Taken by those who are sick and tired of work? (4,4)
I believe the answer is:
rest cure
'work?' is the definition.
(rest-cure is a kind of work)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for rest cure that I've seen before include "Type of treatment" , "Treatment requiring inactivity and quiet" , "Prolonged period of inactivity as medical treatment" , "Treatment involving peace and quiet" , "Therapeutic break" .)