Note tsar has a sofa (5)
I believe the answer is:
divan
'a sofa' is the definition.
(I know that divan is a type of sofa)
'note tsar' is the wordplay.
'note' becomes 'D' (musical note).
'tsar' becomes 'ivan' (name of several Russian tsars).
'd'+'ivan'='DIVAN'
'has' is the link.
(Other definitions for divan that I've seen before include "Piece of furniture" , "Sort of bed" , "Backless seat; bed" , "Long backless sofa" , "Sofa - bed" .)