What is associated with: circus oz which turned 21 in 1999 is a zany satirical circus from this country thats nicknamed oz?

Based on the clue 'circular spinning food tray on a table set for a s...', what is the answer? What is referred to by 'circum'? What is referred to by 'circumstance partner for elgar'? Based on the clue 'circus folk call this animal a convict no offense ...', what is the answer? Based on the clue 'circus polka was originally choreographed for thes...', what is the answer? Based on the clue 'cire perdue or lost wax a process of casting figur...', what is the answer? Based on the clue 'cirque du soleil first made bungee an art form in ...', what is the answer? Based on the clue 'cirque du soleil performs its dazzling alegria sho...', what is the answer?