Historical clue formulations

• Cirque du Soleil stars, e.g. — 2020-09-16
• Cirque du Soleil performers — 2018-07-26
• They might jump through hoops for you — 2016-11-20
• Those falling head over heels? — 2016-07-23
• Ones seeking steady work? — 2005-12-24
• Tumblers — 1995-12-02