Restorative (8)
'restorative' is the definition.
(I know that restorative can be written as tonic)
This is the entire clue.
(Other definitions for tonic that I've seen before include "Small drink of spirits" , "It goes with gin" , "Invigorating medicine - keynote" , "something nice and fresh" , "Quinine water" .)
'restorative' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for remedial that I've seen before include "Intended to counteract loss" , "palliative" , "Providing a cure or treatment for illness or deficiency" , "Serving to put right" , "Corrective" .)