Learned English not polite about Italian (7)
I believe the answer is:
erudite
'learned' is the definition.
('erudite' can be a synonym of 'learned')
'english not polite about italian' is the wordplay.
'english' becomes 'e' (abbreviation).
'not polite' becomes 'rude' ('rude' is the opposite to 'polite').
'about' indicates putting letters inside.
'italian' becomes 'it'.
'rude' going around 'it' is 'rudite'.
'e'+'rudite'='ERUDITE'
(Other definitions for erudite that I've seen before include "Highly learned" , "Learned and scholarly" , "Well read" , "Having deep knowledge" , "academic" .)