Paper supplier appears as crowd stop working (5,5)
I believe the answer is:
press baron
'paper supplier' is the definition.
(term for a newspaper boss)
'crowd stop working' is the wordplay.
'crowd' becomes 'press' (to press can mean to crowd around).
'stop' becomes 'bar' (bar can mean to stop or prevent).
'working' becomes 'on' (on can mean working or activated).
'press'+'bar'+'on'='PRESS BARON'
'appears as' is the link.
(Other definitions for press baron that I've seen before include "media mogul" , "Beaverbrook?" , "Important newspaperman" .)