Well-being (6)
I believe the answer is:
health
'well-being' is the definition.
(I know that health is a type of well-being)
This is all the clue.
(Other definitions for health that I've seen before include "Clinician's concern - toasted condition?" , "Establishment housing local medical services" , "Freedom from illness" , "Soundness; toast" , "Fettle -- condition" .)