Beatrice, to Leonato, in "Much Ado About Nothing” (5)
I believe the answer is:
niece
'beatrice to leonato in much ado about nothing' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for niece that I've seen before include "Daughter of a sibling" , "Family relation" , "One of the family" , "A younger female relative" , "Female family member" .)