Possible Clues:

• Tented entertainment
• Where to see clowns and three-rings
• Approximately dropping 20%, American company performing
• Where the top of it is big with a ring
• Oval building not entirely about America
• You must have a ring for the cur in sic
• 15 11 taking a turn in the prevailing conditions
• The top for it has to be big
• Situation, in brief, around university in turmoil
• Travelling tent show