| Certain opening | 15 |
| Certain opening night attendee | 30 |
| Certain opening words | 21 |
| Certain opening-night attendee | 30 |
| Certain opera singer | 20 |
| Certain opera singers | 21 |
| Certain operating system | 24 |
| Certain operative | 17 |
| Certain operators | 17 |
| Certain optimist | 16 |
| Certain optimists | 17 |
| Certain oranges | 15 |
| Certain orbital points | 22 |
| Certain orchestra | 17 |
| Certain orchestra member | 24 |
| Certain ore | 11 |
| Certain ore content | 19 |
| Certain Oregon resident | 23 |
| Certain organ part | 18 |
| Certain organic compound | 24 |
| Certain organic compounds | 25 |
| Certain organizations | 21 |
| Certain organs | 14 |
| Certain orgs. | 13 |
| Certain Oriental rug maker | 26 |
| Certain oriental women | 22 |
| Certain ornamentations | 22 |
| Certain ornaments in architecture | 33 |
| Certain orthodox Jew | 20 |
| Certain orthoptera | 18 |
| Certain Oscar winners | 21 |
| Certain outbreak | 16 |
| Certain outdoor growing area | 28 |
| Certain outdoorsman | 19 |
| Certain outing | 14 |
| Certain overalls | 16 |
| Certain overimbiber | 19 |
| Certain overseas reporter | 25 |
| Certain overthrown leader | 25 |
| Certain ovines | 14 |
| Certain owl | 11 |
| Certain oyster hunters | 22 |
| Certain P.O. delivery | 21 |
| Certain P.O. mail | 17 |
| Certain Pac-Man ghost | 21 |
| Certain pacesetter | 18 |
| Certain pachyderms's proboscises | 36 |
| Certain pack animals | 20 |
| Certain pack member | 19 |
| Certain package | 15 |
| Certain packages | 16 |
| Certain packed container | 24 |
| Certain paddle-wielders | 23 |
| Certain pads, for short | 23 |
| Certain pages | 13 |
| Certain painkillers | 19 |
| Certain paint protector | 23 |
| Certain paint treatment | 23 |
| Certain painting | 16 |
| Certain paintings | 17 |
| Certain paints | 14 |
| Certain pajamas | 15 |
| Certain palm tree extract | 25 |
| Certain palms | 13 |
| Certain Pan Arab Games participant | 34 |
| Certain pancake makeup | 22 |
| Certain pancakes | 16 |
| Certain panhandle state | 23 |
| Certain papal council | 21 |
| Certain paper deliverer | 23 |
| Certain papers | 14 |
| Certain parade | 14 |
| Certain parallel: Abbr. | 23 |
| Certain parallelogram (Var.) | 28 |
| Certain parallelograms: Abbr. | 29 |
| Certain parasitic creepy-crawler | 32 |
| Certain parcels of earth | 24 |
| Certain parents | 15 |
| Certain parents, to their tots | 30 |
| Certain parientas | 17 |
| Certain Paris finale | 20 |
| Certain Paris natives | 21 |
| Certain Parisian desserts | 25 |
| Certain park visitor | 20 |
| Certain Parliament member | 25 |
| Certain parliaments | 19 |
| Certain parlor guest | 20 |
| Certain parlor's offering | 29 |
| Certain parrots | 15 |
| Certain part of the evening, slangily | 37 |
| Certain participant in a chorus line | 36 |
| Certain partner: Abbr. | 22 |
| Certain party | 13 |
| Certain party adornment | 23 |
| Certain party attire | 20 |
| Certain party deliveries | 24 |
| Certain party people: Abbr. | 27 |
| Certain party-goers | 19 |
| Certain partygoer | 17 |
| Certain pass | 12 |