Possible Clues:

• Column-lined pedestrian way
• Passage taken by Greeks to Agora — or from letters to 28
• Sort of colonnade to put in South America
• What would bring some philosophers to Athens?
• It often bordered an agora
• Promenade site of yore
• Covered walk with colonnade
• Has to assemble part of colonnade
• Where Greek met Greek
• Portico, colonnade