What's left after death? (6)
I believe the answer is:
legacy
'what's left after death?' is the definition.
(a legacy is left to one's heirs)
This is the entire clue.
(Other definitions for legacy that I've seen before include "Gift of property by will" , "Post-death gift" , "A bequest, something left in a will" , "Hand-me-down" , "Something handed down" .)