Possible Clues:

• A character starting trade needs to organise a bit of capital
• Bow surrounds metal (not lead!) wrapping gun
• Part of our capital -- least endangered part
• London area north of the Thames
• In which one would wear out a whistle
• See 1
• Side of London associated with Cockneys (4.3)
• Dined with daughter, hosting son, where plates are for standing on?
• Here find Cockney chief carrying weapon?
• Cockney newsman carried a gun