Popular picture, perhaps, still being sold (2,5)
I believe the answer is:
in print
'still being sold' is the definition.
'popular picture perhaps' is the wordplay.
'popular' becomes 'in'.
'picture perhaps' becomes 'print'.
'in'+'print'='IN PRINT'
(Other definitions for in print that I've seen before include "(Of book) available" , "available from publisher" , "Published" .)