Image of Bill deep in conversation (7)
I believe the answer is:
tableau
'image' is the definition.
(thesaurus)
'bill deep in conversation' is the wordplay.
'bill' becomes 'tab' (a tab is a bill at a bar).
'deep' becomes 'low' (similar in meaning).
'in conversation' shows a homophone (sound like).
'low' is a homophone of 'leau'.
'tab'+'leau'='TABLEAU'
'of' acts as a link.
(Other definitions for tableau that I've seen before include "Scene of still figures" , "Scene, representation" , "dramatic picture" , "Painting - spectacle" , "Group of models representing a scene" .)