| Owner of the Buddy List trademark | 33 |
| Owner of the farm where Woodstock took place | 44 |
| Owner of the Galápagos Islands | 33 |
| Owner of the highest building in Chicago | 40 |
| Owner of The Huffington Post since 2011 | 39 |
| Owner of the largest bed Goldilocks tried | 41 |
| Owner of the vanity plate "88 KEYS" | 45 |
| Owner of TV's Fantasy Island | 32 |
| Owner/waitress in "Garfield" | 38 |
| Owners, landlords and tenants: Abbr. | 36 |
| Owning property, but in need of money | 37 |
| Oxfam and Save the Children, e.g. | 33 |
| Oxford English Dictionary finish | 32 |
| Oxford student's expense account | 36 |
| Oxford University college since 1326 | 36 |
| Oxford's ''Gloomy Dean'' | 44 |
| Oxford's "dreaming ___" | 37 |
| Oxford, e.g., to an Oxford student | 34 |
| Oxford-to-London direction, briefly | 35 |
| Oxfordshire town where Gary Glitter is from | 43 |
| Oxonian "Table Talk" author: 1689 | 43 |
| Oxygen suppliers for scuba divers | 33 |
| Oxymoronic office machine output | 32 |
| Oxymoronically named British DJ __ Slim | 39 |
| Oyster eater in a Lewis Carroll verse | 37 |
| Oysters are particularly rich in it | 35 |
| Oysters on the shell establishment | 34 |
| Oysters-on-the-half-shell seller | 32 |
| Oz musical, with "The" | 32 |
| Ozone layer pollutant, for short | 32 |
| Ozzfest "Evolve" rockers | 34 |
| Ozzfest "Steep Trails" band | 37 |
| Ozzie and Harriet, or wrestling holds | 37 |
| Ozzie or Harriet, to Gunnar and Matthew | 39 |
| Ozzie Smith's retired number | 32 |
| Ozzy "Diary of a Madman" song (Abbr.) | 47 |
| Ozzy "No ___ for the Wicked" | 38 |
| Ozzy "___ Away (the Night)" | 37 |
| Ozzy "___ for the Wicked" | 35 |
| Ozzy "___, I'm Coming Home" | 41 |
| Ozzy has "Ultimate" ones | 34 |
| Ozzy has "Ultimate" ones? | 35 |
| Ozzy Osbourne became one in 1979 | 32 |
| Ozzy Osbourne's "___ the Moon" | 44 |
| Ozzy Osbourne's music, informally | 37 |
| Ozzy Osbourne's record label | 32 |
| Ozzy's Black Sabbath replacement | 36 |
| Ozzy-fronted '78 Sabbath album | 34 |