A residence of note? (4)
I believe the answer is:
flat
This clue is a double definition.
'a residence' is the first definition.
(I've seen this before)
'note?' is the second definition.
(thesaurus)
'of' is the link.
(Other definitions for flat that I've seen before include "one or more in uniform" , "Digs perhaps" , "Apartment - below the note" , "In music, below the correct pitch" , "Not sloping; apartment" .)