We learn about rehabilitation (7)
I believe the answer is:
renewal
'rehabilitation' is the definition.
('renewal' can be a synonym of 'rehabilitation')
'we learn about' is the wordplay.
'about' indicates an anagram.
'we'+'learn'='welearn'
'welearn' with letters rearranged gives 'RENEWAL'.
(Other definitions for renewal that I've seen before include "fresh start" , "Renovation; resumption" , "Replenishment" , "Continuance" , "Resumption, re-establishment" .)