Opera singer with new bed (5)
I believe the answer is:
'bed' is the definition.
(type of bed)
'opera singer with new' is the wordplay.
'opera singer' becomes 'diva' (I've seen this before).
'with' means one lot of letters go next to another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
(Other definitions for divan that I've seen before include "Sofa - bed" , "Sort of bed" , "resting place" , "Piece of furniture" , "Sideless, backless couch" .)