Shall have determination (4)
I believe the answer is:
This clue is a double definition.
'shall' is the first definition.
'determination' is the second definition.
(I've seen this in another clue)
'have' is the link.
(Other definitions for will that I've seen before include "Resolve - testament" , "Inclination" , "Intention; legal document" , "Final disposition" , "self-control" .)