Close relative of Bianca (7)

I believe the answer is:

blanche

(Other definitions for blanche that I've seen before include "dish from 4 26 21 [A STREETCAR NAMED DESIRE]" , "Girl" , "Name of woman" , "- DuBois (Streetcar Named Desire)" , "Female" .)

I've seen this clue in the Newsday.

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