A pundit who's taught many a lesson (7)
I believe the answer is:
scholar
'a pundit' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for scholar that I've seen before include "Subject of poem by 1 across" , "university type?" , "Man of letters" , "Distinguished academic" , "Academic, schoolboy" .)