Post-op regimen (5)
I believe the answer is:
rehab
'post-op 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 "Restoration to health after, eg, addiction (colloq.)" , "Process of restoring, eg, an addict to health" , "convalescent home?" , "Health-restoring process" , "remedial treatment" .)