In need of a rest-cure? (4,3,5)
I believe the answer is:
sick and tired
'in need' is the definition.
Both the answer and definition are adjectives.
Perhaps there's a link between them I don't understand?
'a rest-cure?' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'an' and 'an' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Another definition for sick and tired that I've seen is " Completely fed up".)