Possible Clues:

• Tricorn we fitted for him?
• Bank reserving private credit for old teller
• Tester about to have caught announcer
• One who might disclose information to market auditors
• News job of yore
• He told citizens of crown's entanglement with rank outsider?
• 'The person who used to make public announcements in the streets (4,5)'
• One who might ring a bell
• Old newsman involved in row with cretin
• Bellman as Bierce's earliest medium