big top

noun3

1. •
   A circus tent, especially the largest in a given circus, where the central attractions take place.

   • As a trapeze performer, she generally worked in the big top, but due to her injury, she was stuck working concessions.
2. •
   A large tent of the style used for circusses.
3. •
   The circus; the circus lifestyle.

   • He had been a big top performer in his youth, but in a twist of fate he had run away to become an investment banker.