Deans going out with her (4)

I believe the answer is:

edna

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

I can't explain the remainder of the clue.

(Other definitions for edna that I've seen before include "Barry Humphries' Dame" , "- O'Brien, Irish writer" , "Dame - Everage, housewife-superstar" , "Famous dame" , "Girl's name; Dane (anag.)" .)

I've seen this clue in The Irish Independent.

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