| Opus __: "The Da Vinci Code" sect | 43 |
| Opus ___ ("The Da Vinci Code" group) | 46 |
| Opus ___ ("The Da Vinci Code" sect) | 45 |
| Or's correlative, in Yorkshire | 34 |
| Oral polio vaccine pioneer Albert | 33 |
| Orally take huge amounts of salt water (4) | 42 |
| Orange 'Sesame Street' Muppet | 37 |
| Orange "Sesame Street" denizen | 40 |
| Orange "Sesame Street" Muppet | 39 |
| Orange and blue wearer, for short | 33 |
| Orange circular button in SoundCloud | 36 |
| Orange County's area, slangily | 34 |
| Orange item set out by a highway crew | 37 |
| Orange leftover eaten on Black Friday | 37 |
| Orange monster on "Sesame Street" | 43 |
| Orange Muppet voiced by Fran Brill | 34 |
| Orange Pekoe or English Breakfast | 33 |
| Orange Place on a Monopoly board | 32 |
| Orange shade named for a painter | 32 |
| Orange square with Tennessee and New York | 41 |
| Orange tea that's really black | 34 |
| Orange tree oil used in perfumes | 32 |
| Orange ___ (tea that is, ironically, black) | 43 |
| Orange, peach or strawberry product | 35 |
| Orange, tangerine, and grapefruit hybrid | 40 |
| Orange-and-black perennial [2010] | 33 |
| Orange-and-black-winged butterflies | 35 |
| Orange-nosed Sesame Street resident | 35 |
| Orange-roofed eateries, for short | 33 |
| Orange-roofed establishment, in brief | 37 |
| Orange-roofed restaurant, familiarly | 36 |
| Orange-to-red star, as Aldebaran | 32 |
| Oranges' neighbors on spectrum | 34 |
| Oranges, reds and golds, in fashion terms | 41 |
| Orator's improvised platform | 32 |
| Oratorio with the "Hallelujah" chorus | 47 |
| Orb's partner, in British iconography | 41 |
| Orbison of the Traveling Wilburys | 33 |
| Orbison who sang "Oh, Pretty Woman" | 45 |
| Orbital point farthest from Earth | 33 |
| Orbital point farthest from the sun | 35 |
| Orbital points farthest from Earth | 34 |
| Orbital position nearest the sun | 32 |
| Orbital station that broke up in 2001 | 37 |
| Orchard man's street in Atlanta? | 36 |
| Orchestra conductor's outfit | 32 |
| Orchestra leader born July 4, 1911 | 34 |
| Orchestra that plays light classical music | 42 |
| Orchestra's "tuning fork" | 39 |
| Orchestra's "tuning" instrument | 45 |
| Orchestra's funding org., perhaps | 37 |
| Orchestra's percussion or strings, e.g. | 43 |
| Orchestra's place on Broadway | 33 |
| Orchestra's place, sometimes | 32 |
| Orchestra's tuning instrument | 33 |
| Orchestral "tuning fork" | 34 |
| Orchestral composition based on literature | 42 |
| Orchestral composition by Claude Debussy | 40 |
| Orchestral fairy tale by Prokofiev | 34 |
| Orchestral Manoeuvres in the Dark, briefly | 42 |
| Orchestral work premiered in 1805 | 33 |
| Ordeal involving a penalty for an airline? | 42 |
| Ordeals for would-be Ph.D.'s | 32 |
| Order actress Ellen to switch sides? | 36 |
| Order after "Ready ... aim ..." | 41 |
| Order at the George & Dragon | 32 |
| Order concerning Amtrak vehicles? | 33 |
| Order countermanded by "Down, boy!" | 45 |
| Order for "a blue lady" | 33 |
| Order for a malfunctioning rocket | 33 |
| Order founded by St. Ignatius of Loyola | 39 |
| Order from a bar regular, with "the" | 46 |
| Order from a mug shot photographer | 34 |
| Order from a villain to the henchmen | 36 |
| Order from an old English outlaw to his cohorts? | 48 |
| Order from the place on the corner | 34 |
| Order given before shooting starts | 34 |
| Order given when taking no prisoners | 36 |
| Order in a macrobiotic restaurant | 33 |
| Order including frogs, toads, etc. | 34 |
| Order of the British Empire and others | 38 |
| Order of the British Empire, e.g. | 33 |
| Order of the __ Eagle (Mexican medal) | 37 |
| Order often "on the side" | 35 |
| Order often pierced by a toothpick | 34 |
| Order one so-so ice cream drink? | 32 |
| Order one-on-one contest, at first (5) | 38 |
| Order sought by an accused before trial | 39 |
| Order that a cook never gets straight | 37 |
| Order that may be scrambled or sunny-side up | 44 |
| Order to a "Harvest Moon": 1908 | 41 |
| Order to a cowboy (with ''up'') | 47 |
| Order to a cowboy, with "up" | 38 |
| Order to a D.A. with a hung jury? | 33 |
| Order to a slow-moving counterman? | 34 |
| Order to an imp, with "up" | 36 |
| Order to attack, with "on" | 36 |
| Order to keep a fight from escalating | 37 |
| Order to nab a New York newspaper nerd now? | 43 |
| Order to the "Ship of State" | 38 |