Senior nurse (6)
'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?" .)
'senior nurse' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for matron that I've seen before include "school officer" , "Senior nurse" , "Nurses' manager" , "One used to be in charge of hospital nurses" , "Old woman" .)