Sister of Emily and Charlotte (4)
I believe the answer is:
anne
'sister of emily and charlotte' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for anne that I've seen before include "- - of Cleves" , "Queen 1702-1714" , "Queen seventeen hundred and two to seventeen fourteen" , "--- Elliot, later Wentworth (J. Austen)" , "English queen" .)