Beginner got erudite (7)
I believe the answer is:
learned
'erudite' is the definition.
('learned' can be a synonym of 'erudite')
'beginner got' is the wordplay.
'beginner' becomes 'l'.
'got' becomes 'earned' (earning is a kind of getting).
'l'+'earned'='LEARNED'
(Other definitions for learned that I've seen before include "Full of knowledge" , "Gained knowledge" , "Acquired information, being well educated" , "Came to know" , "Having great knowledge" .)