Corrective (8)
'corrective' is the definition.
(I know that corrective can be written as disciplinary)
This is the entire clue.
(Other definitions for disciplinary that I've seen before include "Relating to rules of conduct" , "Punitive" .)
'corrective' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for remedial that I've seen before include "special teaching" , "Intended to counteract loss" , "Intended as a cure" , "Corrective" , "Medicinal" .)