Demand to be precise (5)
I believe the answer is:
exact
I believe this is a double definition.
'demand' is the first definition.
(I know that demand can be written as exact)
'precise' is the second definition.
(I know that precise can be written as exact)
'to be' acts as a link.
(Other definitions for exact that I've seen before include "Precise - demand" , "Spot-on" , "Explicit" , "Force out" , "accurate in all details" .)