Crossword Genius

So perhaps Brexit nasty for this woman? (6)

Ross

I believe the answer is:

eunice

'for this woman?' is the definition.

I don't understand the remainder of the clue.

(Other definitions for eunice that I've seen before include "Female name deriving from happy victory in Greek" , "Woman" , "Girl" , "Girl's name" .)

I've seen this clue in The Times.
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