Possible Clues:

• Unattached trim gangster from the capital
• See new sign of agreement over City
• Here M40 leads Oxford type, say, learner ahead to West
• It's upstream from Greenwich
• Student on and on about day in big city
• 6 over the 7 - and he author of The Call of the Wild
• Eccentric imprisons neighbour­hood extremists in capital
• Where the Clash had their calling?
• Liberal Spanish gent added to working capital
• Where Warren Zevon's "Werewolves" reside