There is a total of 6421 clues beginning with op
- Opera commissioned by a khedive
- Opera commissioned by the khedive of Egypt
- Opera company with muscle
- Opera composer
- Opera composer Gian Carlo
- Opera composer Nikolai
- Opera composer whom Victor Borge referred to as "Joe Green"
- Opera composer
- Opera composer–Donizetti's teacher
- Opera conductor Alberto
- Opera conductor Daniel
- Opera conductor Daniel ___
- Opera conductor's place
- Opera conductor
- Opera cry
- Opera cycle
- Opera cycle
- Opera dated 1871
- Opera debut of 1871
- Opera debut of 1900
- Opera debuting in Cairo in 1871
- Opera director Capobianco
- Opera director Scotto
- Opera diva Callas
- Opera diva Lee
- Opera diva's book
- Opera diva's solo
- Opera division
- Opera division
- Opera divisions
- Opera ender?
- Opera excerpt
- Opera expert Prato
- Opera extra's prop
- Opera extra, for short
- Opera extra
- Opera extras
- Opera extras, briefly
- Opera extras, for short
- Opera famous for Leonora overture
- Opera fan's opposite of "buffa"
- Opera fan's shout
- Opera fan?
- Opera favorite
- Opera feature
- Opera feature
- Opera feature: Abbr
- Opera features
- Opera featuring a "grave-digging duet"
- Opera featuring a captured princess
- Opera featuring Don José and Escamillo
- Opera featuring elephants
- Opera featuring Iago
- Opera featuring the "Flower Duet"
- Opera featuring the "Prisoners' Chorus"
- Opera featuring the "Willow Song"
- Opera figure
- Opera first performed in 1762
- Opera first performed in 25 Down
- Opera follower
- Opera follower?
- Opera for a coloratura
- Opera for singer Cook?
- Opera for the masses
- Opera gem
- Opera genre
- Opera genre for "Tosca" and "Pagliacci"
- Opera genre?
- Opera giant
- Opera girl
- Opera girl and others
- Opera girl et al
- Opera glass
- Opera glasses
- Opera glasses on a handle
- Opera glasses, eg
- Opera glasses, for short
- Opera goddess
- Opera great Beverly
- Opera great Enrico
- Opera great Pavarotti
- Opera great Pinza
- Opera great ___-Casazza
- Opera great
- Opera group sponsored by a '70s-'80s sitcom family?
- Opera hat
- Opera hat
- Opera headgear
- Opera headliner
- Opera headliners
- Opera headpieces
- Opera heavies
- Opera heavy
- Opera hero and others
- Opera hero's range, often
- Opera hero, often
- Opera hero, usually
- Opera hero
- Opera heroes
- Opera heroes, typically