ringmaster
noun
ring·mas·ter ˈriŋ-ˌma-stər 
: one in charge of performances in a ring (as of a circus)
broadly : a supervisor or moderator especially of a performance or presentation
the ringmaster of a talk show
Example Sentences
Recent Examples on the Web Oakleaf, a Fish and Wildlife biologist, is the ringmaster of the cross-foster operations as well as point person for area ranchers, who are told when new pups are placed on land their cattle graze. 
Matt Mcclain, Washington Post, 25 Aug. 2022 Harris posed as a circus ringmaster, and Burtka was unrecognizable as a scary clown. Ellie Beeck, PEOPLE.com, 21 July 2022 Korelitz’s skill as the ringmaster of this vast collection of episodes feels particularly dazzling. Ron Charles, Washington Post, 31 May 2022 Team owner Jesse Cole serves as ringmaster, darting around in a yellow tuxedo and top hat, leading sing-alongs — Woah, livin’ on a prayer — and judging toddler races between innings. Los Angeles Times, 16 May 2022 Pokéboy awakens surrounded by three Pokémon and the fetchingly dressed—purple bobble hat and striped ringmaster pants—Professor Laventon. Will Bedingfield, Wired, 2 Feb. 2022 As the event consumed ever more floor space, Mr. Warren performed his role as ringmaster on roller skates. Steve Lohr, New York Times, 30 Nov. 2021 Tyler Huff played ringmaster, throwing for 156 yards and two touchdowns Friday to help the high-flying West Orange Warriors crush Plant City Durant 55-6 in a Class 8A Region 3 quarterfinal football game. Lynn Ramsey, orlandosentinel.com, 12 Nov. 2021 Spooky fair features scary fun with a family-friendly carnival, ghost clowns, and a mad ringmaster with a mystery to solve. Mary Lou Cruz, sun-sentinel.com, 20 Sep. 2021 See More
Matt Mcclain, Washington Post, 25 Aug. 2022 Harris posed as a circus ringmaster, and Burtka was unrecognizable as a scary clown. Ellie Beeck, PEOPLE.com, 21 July 2022 Korelitz’s skill as the ringmaster of this vast collection of episodes feels particularly dazzling. Ron Charles, Washington Post, 31 May 2022 Team owner Jesse Cole serves as ringmaster, darting around in a yellow tuxedo and top hat, leading sing-alongs — Woah, livin’ on a prayer — and judging toddler races between innings. Los Angeles Times, 16 May 2022 Pokéboy awakens surrounded by three Pokémon and the fetchingly dressed—purple bobble hat and striped ringmaster pants—Professor Laventon. Will Bedingfield, Wired, 2 Feb. 2022 As the event consumed ever more floor space, Mr. Warren performed his role as ringmaster on roller skates. Steve Lohr, New York Times, 30 Nov. 2021 Tyler Huff played ringmaster, throwing for 156 yards and two touchdowns Friday to help the high-flying West Orange Warriors crush Plant City Durant 55-6 in a Class 8A Region 3 quarterfinal football game. Lynn Ramsey, orlandosentinel.com, 12 Nov. 2021 Spooky fair features scary fun with a family-friendly carnival, ghost clowns, and a mad ringmaster with a mystery to solve. Mary Lou Cruz, sun-sentinel.com, 20 Sep. 2021 See More Word History
First Known Use
1845, in the meaning defined above