Possible Clues:

• Ancient Greek city whose citizens were famed for toughness
• Thanks to a yard of ancient Greece
• Fight army in city of old
• No place for hedonists seeking culture in Bath
• Once powerful city-state of ancient Greece
• Greek city, famous for its citizens' austere lifestyle
• Old Greek state to practise fighting with volunteers
• Where Cleomenes ruled
• Ancient Greek city, capital of Laconia
• Cheers on box? Or Enemy of Athens?