Possible Clues:

• Fifty and five hundred, both on where's there's a cockney
• - Pride; - plane
• Agree no figure will be given as return from capital
• City of Piccadilly
• Get a pound of a further five hundred, both on for capital
• Left working man in city
• City for the non-old, oddly
• Jack - , US author (White Fang); city
• Left on river in Yorkshire city
• 'Call of the Wild' author