Therapeutic (8)
'therapeutic' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for remedial that I've seen before include "palliative" , "I'm leader of curative sort" , "special teaching" , "for slow learners" , "Intended as a cure" .)
(Other definitions for curative that I've seen before include "Restoring to health" , "Therapeutic" , "health-giving" , "Healing" , "Medicine" .)