Beneficiary back in house after member had dinner (7)
I believe the answer is:
legatee
'beneficiary' is the definition.
(I know that legatee is a type of beneficiary)
'back in house after member had dinner' is the wordplay.
'back in' says to take the final letters (the 'back' of the word).
'after' says to put letters next to each other.
'member' becomes 'leg' (member can mean a limb).
'had dinner' becomes 'ate' (I've seen this in another clue).
The final letter of 'house' is 'e'.
'leg'+'ate'='legate'
'e' put after 'legate' is 'LEGATEE'.
(Other definitions for legatee that I've seen before include "One receiving something left in a will" , "Receiver of money from a will" , "Gifted person" , "Person who is left something in a will" , "One benefiting from a will" .)