Patience for example is what's expected of the Met
O_E_A
I am sure the answer must be Opera, with the Met being the New York version rather than the London police force. But where does patience come in? The "for example" made me think it might be "Omega".
//Patience entered the repertory of the English National Opera in 1969, in an acclaimed production with Derek Hammond-Stroud as Bunthorne. The production was later mounted in Australia and was preserved on video as part of the Brent Walker series. In 1984, ENO also took the production on tour to the Metropolitan Opera House, in New York City.[26]//