Beneficiary of a will (7)
I believe the answer is:
legatee
'beneficiary of a will' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for legatee that I've seen before include "Recipient of a bequest" , "one remembered" , "Receiver of money from a will" , "person entitled to benefit" , "One receiving a bequest" .)