Will figure (8)
I believe the answer is:
executor
'will figure' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for executor that I've seen before include "Implementer of a will" , "One dealing with will" , "Person nominated to carry out the terms of a will" , "One ensures terms of a will are carried out" , "Person fulfilling a will" .)