Willingly die? (7)
I believe the answer is:
testate
'willingly die?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
This is all the clue.
Can you help me to learn more?
(Other definitions for testate that I've seen before include "Having made a legal will" , "Having written a valid will" , "Dying with a will" , "Having made a will before death" , "State of having made a will" .)