Possible Clues:

• Open square — place with a couple of extreme characters
• Square up a record involving literary outsiders
• Public square with room for pedestrians
• Open town square
• Square number rotated in original scheme
• Public square for pedestrians
• Around bottom of sundial, a shoot coming up in Spanish square
• New York hotel in 'The Great Gatsby,' with 'the'
• Shopping centre drama mostly with extreme characters
• Post second class and third class map back to town square?