Crossword Genius

Senior nurse (6)

Ross

I think it could be either:

sister

matron

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

This is the entire clue.

(Other definitions for sister that I've seen before include "A relative to resist" , "of the same origin" , "Resist (anag) - nurse" , "Member of family" , "twin?" .)

I've seen this clue in The Mirror, the Evening Standard and The Times.
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