Shakespearean heiress (6)
I believe the answer is:
portia
'shakespearean heiress' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for portia that I've seen before include "She married Bassanio (Merchant of Venice)" , "Character in "Julius Caesar" or "The Merchant of Venice"" , "A Shakespearean heroine" , "Shakespearean heiress" , "Wife of Brutus or Bassanio" .)