English abruptly claiming it, showing a degree of culture (9)

I believe the answer is:

eruditely

'showing a degree of culture' is the definition.

'english abruptly claiming it' is the wordplay.
'english' becomes 'e' (abbreviation).
'abruptly' becomes 'rudely'.
'claiming' is an insertion indicator.
'rudely' going around 'it' is 'ruditely'.
'e'+'ruditely'='ERUDITELY'

I've seen this clue in The Independent.

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