There is a total of 6421 clues beginning with op
- Opera that debuted in Cairo
- Opera that debuted in Cairo in 1871
- Opera that ends at the Temple of Vulcan
- Opera that famously ends with the line "La commedia è finita!"
- Opera that includes the "Prisoners' Chorus"
- Opera that includes the aria "Sempre libera"
- Opera that inspired the T-shirt slogan
- Opera that Leonard Bernstein began while on his honeymoon
- Opera that opened Met season
- Opera that opens in Memphis
- Opera that opens on Christmas Eve
- Opera that premiered in Cairo
- Opera that premiered in Cairo in 1871
- Opera that premiered in Rome in 1900
- Opera that premiered on Christmas Eve of 1871
- Opera that starts in a Paris garret
- Opera that takes place in 1800 and premiered in 1900
- Opera that takes place in Memphis
- Opera that the musical "Rent" was adapted from
- Opera that's 2-Down backward
- Opera that's a big draw?
- Opera theme
- Opera title boy
- Opera title character who dies in a conflagration
- Opera title character who drowns
- Opera title character who eats a poison leaf
- Opera title character who gets dragged into hell
- Opera title character who hurls herself from a parapet
- Opera title character who is stabbed by a spurned lover
- Opera title character who shoots himself
- Opera title character who sings "Vissi d'arte"
- Opera title
- Opera topper
- Opera trailer
- Opera troupe member
- Opera tune
- Opera tune
- Opera turned into a 1998 musical
- Opera type
- Opera unfortunately not by 18-Across, because that would make me look brilliant (it's by Puccini)
- Opera unit
- Opera updated for Broadway
- Opera vantage point
- Opera vantage point
- Ópera venue
- Opera villain's voice, often
- Opera villain, often
- Opera villain, typically
- Opera villain, usually
- Opera villain?
- Opera villainess, often
- Opera villainess, sometimes
- Opera villainess, typically
- Opera villainess, usually
- Opera villains, often
- Opera VIP
- Opera VIP
- Opera voice
- Opera voice
- Opera voices
- Opera voices
- Opera wear
- Opera whose name has the same vowels as 25-Down
- Opera whose premiere was delayed by the Franco-Prussian War
- Opera whose second act is called "The Gypsy"
- Opera whose title anagrams to "coats"
- Opera with "Ave Maria"
- Opera with "O patria mia"
- Opera with a "Triumphal March"
- Opera with a noted triumphal march
- Opera with a rustic theme
- Opera with a slave girl
- Opera with a swan prop
- Opera with an Egyptian king
- Opera with an Egyptian setting
- Opera with an Ethiopian heroine
- Opera with aria "Vissi d'arte"
- Opera with chariots
- Opera with Desdemona
- Opera with Egyptian background
- Opera with elephants
- Opera with elephants and Ethiopians
- Opera with eye-popping sets?
- Opera with Princess Amneris
- Opera with the "Gypsy Song"
- Opera with the "Willow Song"
- Opera with the aria "Ave Maria"
- Opera with the aria "E lucevan le stelle"
- Opera with the aria "Largo al factotum," with "The"
- Opera with the aria "Qui trarrò Cassio"
- Opera with the aria "Recondita armonia"
- Opera with the aria "Vissi d'arte"
- Opera with the King of Egypt
- Opera with the soprano aria "Ave Maria"
- Opera written in 13 days (with "The")
- Opera written in 1871
- Opera written to celebrate a canal opening
- Opera ___
- Opera ___ (classical music record label)
- Opéra ___ (comic opera)