Property claim for outstanding debt (4)
I believe the answer is:
lien
'property claim for outstanding debt' 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 "Legal right to detain property" , "Right to another's property, if an obligation is not discharged" , "Right to keep property" , "Security for a debt" , "The right to take property if an obligation is not discharged" .)