Possible Clues:

• Sound of traffic in London
• Blowing part of our capital
• Typical ''Auld Lang Syne'' accompaniment
• Showing impatience as cabbie might in London district?
• Sounds from horns
• South London area
• Having a blast in South London
• American's carrying nothing within London area
• Showing impatience on road in area south of Wandsworth
• Blowing a horn