Legal ownership (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
title
'legal ownership' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for title that I've seen before include "Sir, or madam" , "Name signifying rank" , "established claim to ownership" , "One published" , "Deed showing legal right to a property" .)