Possible Clues:

• Once fashionable avenue for riders in London
• Capital place for riding in rank after rank?
• Awful commotion in part of Hyde Park
• Shabby Italian rider's content to go up bridle path
• Track through Hyde Park bringing awful dispute
• The way horses may be ridden in town?
• Terrible quarrel that comes to an end at Hyde Park Corner
• Adverse criticism of Boat Race -- it's overridden
• Bridleway in Hyde Park
• Track that consists of din fronted by singer Johnny