Remedy, therapy (4)
I believe the answer is:
cure
I believe this clue is a double definition.
'remedy' is the first definition.
(I know that remedy can be written as cure)
'therapy' is the second definition.
(I know that cure is a type of therapy)
(Other definitions for cure that I've seen before include "Restore to good health" , "Restorative" , "priest without an accent" , "Parish priest in France" , "Remedy or preserve" .)