Former fixer-upper (5)
I believe the answer is:
rehab
'former fixer-upper' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rehab that I've seen before include "Process of restoring, eg, an addict to health" , "Health-restoring process" , "Course of treatment for addicts" , "Treatment centre (abbrev.)" , "A herb (anag.)" .)