"One of Us” singer Joan (7)
I believe the answer is:
osborne
'one of us singer joan' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for osborne that I've seen before include "Q. Victoria's IOW home" , "13 across's IOW house" , "grand island house" , "Chancellor" , "John --, English dramatist" .)