| Organ ending, in Oxford | 23 |
| Organ for a milking machine | 27 |
| Organ for an otolaryngologist | 29 |
| Organ for eavesdropping | 23 |
| Organ grinder's aide | 24 |
| Organ grinder's pet | 23 |
| Organ near the stomach | 22 |
| Organ next to the stomach | 25 |
| Organ nourishing a fetus | 24 |
| Organ of Corti location | 23 |
| Organ or piece preceder | 23 |
| Organ parts with cones | 22 |
| Organ repair sites, briefly | 27 |
| Organ repair sites, for short | 29 |
| Organ repair sites: Abbr. | 25 |
| Organ that may be caught | 24 |
| Organ that's vented | 23 |
| Organ transplants, e.g. | 23 |
| Organ with a drum in it | 23 |
| Organ with a drum inside | 24 |
| Organic burger ingredient | 25 |
| Organic chemical compound | 25 |
| Organic chemistry suffix | 24 |
| Organic chemistry topic | 23 |
| Organic compound suffix | 23 |
| Organic farmer's creation | 29 |
| Organic farmer's need | 25 |
| Organic farming staple | 22 |
| Organic matter used for fuel | 28 |
| Organic milk dispenser | 22 |
| Organic portion of soil | 23 |
| Organic vegetable container | 27 |
| Organic-compound suffix | 23 |
| Organiser II was an early one | 29 |
| Organism in a relationship? | 27 |
| Organism needing air to exist | 29 |
| Organism needing oxygen | 23 |
| Organism requiring no air | 25 |
| Organism with pseudopods | 24 |
| Organisms sharing a trait | 25 |
| Organisms that need oxygen | 26 |
| Organisms, in combinations | 26 |
| Organist's selection | 24 |
| Organization biggie, briefly | 28 |
| Organization chart topper | 25 |
| Organization for geniuses | 25 |
| Organization for high IQ folk | 29 |
| Organization for Spock | 22 |
| Organization founded in 1864 | 28 |
| Organization founded in 1945 | 28 |
| Organization functionary | 24 |
| Organization in Palestine | 25 |
| Organization leader, in slang | 29 |
| Organization of Ku Kluxers | 26 |
| Organization set up in 1961 | 27 |
| Organization with a lodge | 25 |
| Organization's offshoot | 27 |
| Organization's opposite | 27 |
| Organization's symbol | 25 |
| Organizational offshoot | 23 |
| Organizational regulation | 25 |
| Organizations, for short | 24 |
| Organize a Quaker gathering? | 28 |
| Organize alphabetically | 23 |
| Organize alphabetically, say | 28 |
| Organize, as an exhibit | 23 |
| Organize, as an exhibition | 26 |
| Organized body of knowledge | 27 |
| Organized campaign for peace | 28 |
| Organized crime activity | 24 |
| Organized crime collectors | 26 |
| Organized group of criminals | 28 |
| Organized rumor-spreading | 25 |
| Organized sets of principles | 28 |
| Organized string of gigs | 24 |
| Organized studio visit | 22 |
| Organized U.S. militia force | 28 |
| Organizer introduced in 1996 | 28 |
| Organizer with two pockets | 26 |
| Organizer's organization | 28 |
| Organizes alphabetically, say | 29 |
| Organizes by date, say | 22 |
| Organs in an icy urban legend | 29 |
| Organs men don't have | 25 |
| Organs often used in charades | 29 |
| Organs used in balance | 22 |
| Organs usually found in pairs | 29 |
| Orgs. concerned with beats | 26 |
| Orgs. for former servicemen | 27 |
| Orgy outfits, stereotypically | 29 |
| Orient Express terminus | 23 |
| Orient Express terminus, once | 29 |
| Oriental "way" | 24 |
| Oriental cereal staple | 22 |
| Oriental cuckoos: Var. | 22 |
| Oriental dog, for short | 23 |
| Oriental dress feature | 22 |
| Oriental language: Abbr. | 24 |
| Oriental Miss Universe? | 23 |
| Oriental restaurant cartel? | 27 |