Rude tot improved by being taught? (7)
I believe the answer is:
tutored
'being taught?' is the definition.
('tutored' can be a synonym of 'taught')
'rude tot improved' is the wordplay.
'improved' indicates an anagram.
'rude'+'tot'='rudetot'
'rudetot' anagrammed gives 'TUTORED'.
'by' acts as a link.
(Other definitions for tutored that I've seen before include "Gave private lessons to" , "Privately taught" , "Disciplined" , "Instructed" , "Was coach" .)