Property of note, say (6)
I believe the answer is:
estate
'property' is the definition.
(estate is a kind of property)
'note say' is the wordplay.
'note' becomes 'e' (musical note).
'say' becomes 'state' ('state' can be a synonym of 'say').
'e'+'state'='ESTATE'
'of' acts as a link.
(Other definitions for estate that I've seen before include "all the deceased owned" , "Extensive landed property (6)" , "Scheme of new housing" , "Family land" , "Everything one owns -- tea set (anag)" .)