Bank's property claim (4)
I believe the answer is:
lien
'bank's property claim' 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 a lawyer" , "Right to another's property, if an obligation is not discharged" , "Right to retain property until a debt is paid" , "Legal claim on Nile" .)