Legally preclude giving part of monies to partner (5)
I believe the answer is:
estop
'legally preclude' is the definition.
(I've seen this in another clue)
'part of monies to partner' is the wordplay.
'part of' says the answer is hidden in the clue.
'ESTOP' is hidden within 'monies to partner'.
'giving' acts as a link.
(Other definitions for estop that I've seen before include "Legally check" , "Legally prevent" , "Preclude certain evidence (at law) - bar (archaic)" , "term in law" , "Hinder, preclude (law)" .)