What you need if you're sick of working? (4,4)

I believe the answer is:

rest cure

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'working?' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

I don't understand the rest of the clue.

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(Other definitions for rest cure that I've seen before include "Prolonged period of relaxation as medical treatment" , "Treatment requiring inactivity and quiet" , "Freedom from activity as a medical treatment for stress" , "Easy assignment" , "Soothing treatment" .)

I've seen this clue in the Evening Standard.

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