| Opera by Karl Goldmark | 22 |
| Opera by Humperdinck | 20 |
| Opera by Horatio Parker | 23 |
| Opera by Handel: 1738 | 21 |
| Opera by Handel | 15 |
| Opera by Halévy | 18 |
| Opera by H. Parker | 18 |
| Opera by Glinka | 15 |
| Opera by Giordano | 17 |
| Opera by Donizetti | 18 |
| Opera by Delibes | 16 |
| Opera by d'Erlanger | 23 |
| Opera by Cherubini | 18 |
| Opera buff's subject | 24 |
| Opera boy with 'night visitors' | 39 |
| Opera box | 9 |
| Opera book | 10 |
| Opera bit-role, in a way | 24 |
| Opera bit | 9 |
| Opera bass Jerome ___ | 21 |
| Opera based on Victor Hugo's "Le roi s'amuse" | 63 |
| Opera based on two Wedekind plays | 33 |
| Opera based on Greek legend | 27 |
| Opera based on a Shakespeare play | 33 |
| Opera based on a play by Pierre Beaumarchais, with "The" | 66 |
| Opera based on a Greek legend | 29 |
| Opera based on a Beaumarchais comedy | 36 |
| Opera annoyance? | 16 |
| Opera and Chrome, for two | 25 |
| Opera alternative? | 18 |
| Opera about the steadfast wife of a political prisoner | 54 |
| Opera about the life of Lincoln | 31 |
| Opera about spellbinding stairs? | 32 |
| Opera about an opera singer | 27 |
| Opera about an Ethiopian slave girl | 35 |
| Opera about an enslaved Ethiopian girl | 38 |
| Opera about a hunchbacked jester | 32 |
| Opera about a diva | 18 |
| Opera ... wine ... boot | 23 |
| Opera ... coloratura ... "Eri tu" | 43 |
| Opera "The Tale of ___ Saltan" | 40 |
| Opera "The Golden ---" | 32 |
| Opera "Moses und ___" | 31 |
| Opera piece | 12 |
| Opera | 5 |
| Openwork fabric | 15 |
| Openwork barrier | 16 |
| Openwork appearance | 19 |
| Opens, in a way | 15 |
| Opens, e.g. | 11 |
| Opens, as wine | 14 |
| Opens, as some jackets | 22 |
| Opens, as envelopes | 19 |
| Opens, as documents | 19 |
| Opens, as an aspirin bottle | 27 |
| Opens, as a wine bottle | 23 |
| Opens, as a sugar packet | 24 |
| Opens, as a sleeping bag | 24 |
| Opens, as a ski jacket | 22 |
| Opens, as a pill bottle | 23 |
| Opens, as a letter | 18 |
| Opens, as a hood | 16 |
| Opens, as a gate | 16 |
| Opens, as a fly | 15 |
| Opens, as a door | 16 |
| Opens, as a change purse, perhaps | 33 |
| Opens, as a change purse | 24 |
| Opens, as a car trunk | 21 |
| Opens, as a bottle | 18 |
| Opens, as a beer | 16 |
| Opens, as a baby's pajamas | 30 |
| Opens with effort, as a window | 30 |
| Opens with a combination | 24 |
| Opens wide | 10 |
| Opens up, in a way | 18 |
| Opens up, as a topic | 20 |
| Opens up, as a drain | 20 |
| Opens up for examination, in a way | 34 |
| Opens up at the doctor's office, perhaps? | 45 |
| Opens up an on-line store, e.g. | 31 |
| Opens up a hole in | 18 |
| Opens up | 8 |
| Opens to the elements | 21 |
| Opens the window | 16 |
| Opens the door for | 18 |
| Opens the cage for | 18 |
| Opens slightly | 14 |
| Opens one's eyes | 20 |
| Opens like a map | 16 |
| Opens hightops | 14 |
| Opens for viewing | 17 |
| Opens fire | 10 |
| Opens an envelope, perhaps | 26 |
| Opens an envelope at the Oscars, e.g. | 37 |
| Opens an envelope | 17 |
| Opens again | 11 |
| Opens a website | 15 |
| Opens a tube of toothpaste, e.g. | 32 |
| Opens a tube of toothpaste | 26 |
| Opens a slide fastener | 22 |