| Oxygen-dependent organism | 25 |
| Oxygen-dependent creature | 25 |
| Oxygen-dependent bacterium | 26 |
| Oxygen-consuming organism | 25 |
| Oxygen-consuming bacterium | 26 |
| Oxygen's electrons, e.g. | 28 |
| Oxygen's atomic number | 26 |
| Oxygen tent site, in brief | 26 |
| Oxygen tent locale, briefly | 27 |
| Oxygen sex expert Johanson | 26 |
| Oxygen network co-founder | 25 |
| Oxygen emanating from a lawn? | 29 |
| Oxygen doesn't have one | 27 |
| Oxygen cofounder Winfrey | 24 |
| Oxygen barrier provider | 23 |
| Oxycodone-plus-aspirin brand | 28 |
| Oxycodone-based painkiller | 26 |
| Oxy, Vike and the like | 22 |
| Oxlike African antelope | 23 |
| Oxide used in picture tubes | 27 |
| Oxidation's evidence | 24 |
| Oxfordshire for short | 22 |
| Oxfordian's parent, e.g. | 28 |
| Oxford, to its citizens | 23 |
| Oxford, for one: Abbr. | 22 |
| Oxford, e.g., to its students | 29 |
| Oxford's St. ___ College | 28 |
| Oxford's form preserver | 27 |
| Oxford's emporium is hip? | 29 |
| Oxford yard, for short | 22 |
| Oxford university, familiarly | 29 |
| Oxford university since 1844 | 28 |
| Oxford university nickname | 26 |
| Oxford University college | 25 |
| Oxford scholarship namesake | 27 |
| Oxford offering, for short | 26 |
| Oxford Group's concern | 26 |
| Oxford doctorate, briefly | 25 |
| Oxford courtyard, for short | 27 |
| Oxford area, for short | 22 |
| Oxfam or CARE, for example | 26 |
| Oxen pulling a wagon, say | 25 |
| Oxen might be put in it | 23 |
| Oxen may pull plows in this | 27 |
| Oxcart driver's shout | 25 |
| Ox long popular in crosswords | 29 |
| Owning a yacht may confer it | 28 |
| Owning a large corporation | 26 |
| Ownership card, in Monopoly | 27 |
| Owners without partners | 23 |
| Owners of the Faeroe Islands | 28 |
| Owners of lonely hearts? | 24 |
| Owners of an infamous cow | 25 |
| Owners of a famous cow | 22 |
| Owners of 21 merit badges | 25 |
| Owner-player go-between | 23 |
| Owner's manual reader | 25 |
| Owner's certificate | 23 |
| Owner's cattle mark | 23 |
| Owner's acquisition | 23 |
| Owner of the Twilight Grill? | 28 |
| Owner of the TechCrunch site | 28 |
| Owner of the Snoopy J blimp | 27 |
| Owner of the review site gdgt | 29 |
| Owner of The History Channel | 28 |
| Owner of the Flickr Web site | 28 |
| Owner of the dog Sandy | 22 |
| Owner of the blog TechCrunch | 28 |
| Owner of the Amistad, e.g. | 26 |
| Owner of Purina and Perrier | 27 |
| Owner of PayPal and Skype | 25 |
| Owner of much footwear | 22 |
| Owner of Mr. Bigglesworth | 25 |
| Owner of Lone Star Beer | 23 |
| Owner of Leapin' Lena | 25 |
| Owner of Easter Island | 22 |
| Owner of Columbia Pictures | 26 |
| Owner of Bill Me Later | 22 |
| Owner of an Ayrshire estate | 27 |
| Owner of Abbey Road Studios | 27 |
| Owner of a sitcom diner | 23 |
| Owner of a notable 1849 mill | 28 |
| Owner of a multicolored coat | 28 |
| Owner of a magic hammer | 23 |
| Owner of a famous thumb | 23 |
| Owner of a famous smile | 23 |
| Owner of a contiguous estate | 28 |
| Owner of a complete set | 23 |
| Owner of a certain shay | 23 |
| Owner of "Cheers" | 27 |
| Owned, in the Old Testament | 27 |
| Owned properties, e.g. | 22 |
| Owned jointly by you and me | 27 |
| Owned by the federal govt. | 26 |
| Owned by another at one time | 28 |
| Owned apartment, briefly | 24 |
| Own up to one's sins | 24 |
| Own a few James Brown albums? | 29 |
| Owl-patterned evening wear | 26 |
| Owl's haunt, perhaps | 24 |