Possible Clues:

• Sell things in this part of the newspaper
• Secret announcement of what can cut piece of paper
• It's not widely known, policeman is following a number of them in The Paper synonymous with dealing
• Notices form provided is about European father
• Craigslist listings
• Secret policeman follows a number of those filling columns in the newspaper who are dealing perhaps
• Sorted out a policeman looking to link people to particular jobs
• Where to find Daily Worker perhaps is only open to authorised people close to a policeman
• Paper section
•     What the paranoid C.I.A. publicist did?