Academy that’s grand removed Northern Irish girl (7)

I believe the answer is:

colleen

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'irish girl' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for colleen that I've seen before include "Gaelic girl with English spelling" , "Irish lass" , "Irish miss" , "Young Irish woman" , "Irish girl, English version" .)

I've seen this clue in The Sunday Times.

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