Compel payment to be precise (5)
I believe the answer is:
exact
This clue is a double definition.
'compel payment' is the first definition.
(I've seen this in another clue)
'precise' is the second definition.
(I know that precise can be written as exact)
'to be' is the link.
(Other definitions for exact that I've seen before include "Strict" , "Precise - demand" , "Completely accurate" , "Rigorous" , "As a right, demand" .)