Remedial teacher I put in new form (11)
I believe the answer is:
therapeutic
'remedial' is the definition.
('therapeutic' can be a synonym of 'remedial')
'teacher i put in new form' is the wordplay.
'in new form' indicates anagramming the letters.
'teacher'+'i'+'put'='teacheriput'
'teacheriput' with letters rearranged gives 'THERAPEUTIC'.
(Other definitions for therapeutic that I've seen before include "Curative" , "to improve one's health" , "having a good effect" , "Having a healing effect" , "Relating to the healing of disease" .)