Back-to-health regimen (5)
I believe the answer is:
rehab
'back-to-health regimen' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rehab that I've seen before include "getting dry?" , "Alcohol clinic" , "Treatment for alcohol abuse" , "Process of restoring, eg, an addict to health" , "A herb (anag.)" .)