Rude tot badly educated (7)
I believe the answer is:
tutored
'educated' is the definition.
(similar in meaning)
'rude tot badly' is the wordplay.
'badly' indicates anagramming the letters (letters in the wrong order).
'rude'+'tot'='rudetot'
'rudetot' with letters rearranged gives 'TUTORED'.
(Other definitions for tutored that I've seen before include "Rude tot (anag.)" , "Instructed" , "Disciplined" , "Taught small groups" , "Was coach" .)