Willing subject? (6)
I believe the answer is:
estate
'willing subject?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for estate that I've seen before include "All of one's assets after death" , "Property to be inherited" , "Piece of land with a large house or many small ones" , "House and grounds" , "Property, holdings" .)