What you can still have after getting a clean bill of health? (12)
I believe the answer is:
hypochondria
'health?' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for hypochondria that I've seen before include "Imagined ill-health" , "Imaginary illness" , "Chronic anxiety about one's health" , "Morbid anxiety about one's health" , "Abnormal health worry" .)