| Organic portion of soil | 23 |
| Organic regimen | 15 |
| Organic river pollutant, for short | 34 |
| Organic salt | 12 |
| Organic sci. | 12 |
| Organic sealant | 15 |
| Organic soil | 12 |
| Organic solvent | 15 |
| Organic songs? | 14 |
| Organic soother | 15 |
| Organic structures | 18 |
| Organic suffix | 14 |
| Organic suffixes | 16 |
| Organic token | 13 |
| Organic unit | 12 |
| Organic vegetable container | 27 |
| Organic-chemistry student, often | 32 |
| Organic-compound suffix | 23 |
| Organic-farm machines | 21 |
| Organic-garden need | 19 |
| Organic-orchard no-no | 21 |
| Organic: Abbr. | 14 |
| Organically afraid? | 19 |
| Organically based skin care liquid | 34 |
| Organically foolish? | 20 |
| Organically grown herbal medicines? | 35 |
| Organically loud? | 17 |
| Organically sad? | 16 |
| Organisation des ___ Américains | 34 |
| Organiser II was an early one | 29 |
| Organism | 8 |
| Organism bodies | 15 |
| Organism frequently seen in "The Far Side" | 52 |
| Organism in a relationship? | 27 |
| Organism modified by environment | 32 |
| Organism needing air to exist | 29 |
| Organism needing oxygen | 23 |
| Organism on a slide | 19 |
| Organism once called a Proteus animalcule | 41 |
| Organism requiring no air | 25 |
| Organism that can be brown, red or green | 40 |
| Organism that doesn't require oxygen | 40 |
| Organism that grows from the inside | 35 |
| Organism that splits | 20 |
| Organism with pseudopods | 24 |
| Organism's body | 19 |
| Organism's set of inherited material | 40 |
| Organisms of a region | 21 |
| Organisms sharing a trait | 25 |
| Organisms that need oxygen | 26 |
| Organisms' bodies | 21 |
| Organisms, in biology | 21 |
| Organisms, in combinations | 26 |
| Organisms: Suffix | 17 |
| Organist Stubblefield | 21 |
| Organist's selection | 24 |
| Organization | 12 |
| Organization (abbr.) | 20 |
| Organization behind the Movies for Grownups Awards | 50 |
| Organization biggie, briefly | 28 |
| Organization born at Versailles in 1919 | 39 |
| Organization chart topper | 25 |
| Organization concerned with good breeding | 41 |
| Organization concerned with workers' welfare | 48 |
| Organization for geniuses | 25 |
| Organization for high IQ folk | 29 |
| Organization for high-I.Q. folk | 31 |
| Organization for Knights Templars | 33 |
| Organization for senior travelers | 33 |
| Organization for Spock | 22 |
| Organization for the supersmart | 31 |
| Organization for women in labor? | 32 |
| Organization formed by the Treaty of Versailles | 47 |
| Organization founded by Jerry Falwell | 37 |
| Organization founded in 1864 | 28 |
| Organization founded in 1945 | 28 |
| Organization functionary | 24 |
| Organization in Palestine | 25 |
| Organization leader, in slang | 29 |
| Organization led by a Grand Exalted Ruler | 41 |
| Organization limited to 100 members | 35 |
| Organization nickname that plays off the group's secrecy | 60 |
| Organization of Afro-American Unity cofounder | 45 |
| Organization of Afro-American Unity founder | 43 |
| Organization of Cahn, Styne et al. | 34 |
| Organization of easily frightened people? | 41 |
| Organization of Ku Kluxers | 26 |
| Organization of lawyers (Abbr.) | 31 |
| Organization of river herrings? | 31 |
| Organization originally called the Jolly Corks | 46 |
| Organization set up in 1961 | 27 |
| Organization that approves athletic sites: Abbr. | 48 |
| Organization that assists with home ownership | 45 |
| Organization that began broadcasting on July 4, 1950 | 52 |
| Organization that features Woods, woods and woods | 49 |
| Organization that held its first troop meeting 3/12/1912 | 56 |
| Organization that no U.S. president has ever belonged to | 56 |
| Organization that one person in 50 qualifies for | 48 |
| Organization that publishes the Spanish magazine Segunda Juventud | 65 |
| Organization that sponsors an annual Mind Games competition | 59 |