Displaying knowledge? English not polite about it (7)

I believe the answer is:

erudite

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'displaying knowledge?' is the definition.
I can't tell whether this defines the answer.

'english not polite about it' is the wordplay.
'english' becomes 'E' (abbreviation).
'not polite' becomes 'rude' ('rude' is the opposite to 'polite').
'about' is an insertion indicator.
'rude' placed around 'it' is 'rudite'.
'e'+'rudite'='ERUDITE'

Can you help me to learn more?

(Other definitions for erudite that I've seen before include "Learned and literate" , "academic" , "Rude tie (anag.)" , "Due rite (anag.)" , "Learned and scholarly" .)

I've seen this clue in The Independent.

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