Legal claim on property (4)
I believe the answer is:
lien
'legal claim on property' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lien that I've seen before include "Right to keep property" , "The right to take property if an obligation is not met" , "Legal claim on Nile" , "Legal right over the Nile" , "The right to take property if an obligation is not discharged" .)