| 100% | SSR | 3 | 37-Across was the smallest one: Abbr. |
| 62% | TOE | 3 | A minimus is the smallest one |
| 60% | TOE | 3 | The smallest one is called a minimus |
| 58% | OCEAN | 5 | The Arctic is the smallest one on Earth |
| 55% | MONKEY | 6 | The Pygmy Marmoset is the smallest one on earth |
| 54% | DVR | 3 | TiVo is the brand name of one: Abbr. |
| 53% | DIR | 3 | Jane Campion was the Oscars' best one of 2021: Abbr. |
| 53% | OKLA | 4 | The redbud is one of its symbols: Abbr. |
| 52% | GPA | 3 | In college, a 4.0 is the highest possible one: Abbr. |
| 52% | TSE | 3 | The Nikkei 225 is one of its indexes: Abbr. |
| 52% | GODSAVETHEQUEEN | 15 | "Pray we can hold on to the smaller one, which is more comfortable than the king" |
| 50% | GODSAVETHEQUEEN | 15 | "Pray we can hold on to the smaller one, which is more comfortable than the king" |
| 49% | MANNEQUIN | 9 | 11 Across's lone passenger, Rosie the Rocketeer, is one |
| 48% | SCH | 3 | 16-Across is one: Abbr. |
| 48% | SMILE | 5 | Face of one being framed, say, or the opposite of 20 Across |
| 47% | WED | 3 | One of the 63-Across: Abbr. |
| 47% | SSN | 3 | The first official one was 055-09-0001: Abbr. |
| 47% | HAND | 4 | 52-Across is the best one |
| 46% | DROVE | 5 | Was the designated one? |
| 46% | SLAVE | 5 | 27-Across was the last US president to own one while in Office |
| 45% | ATARI | 5 | Its version of 37-Across was popular in the 1970s-'80s |
| 45% | RUNT | 4 | Smallest one of the litter |
| 44% | VATICAN | 7 | It is the smallest country in the world |
| 44% | AREA | 4 | Rhode Island's is the smallest among US states |
| 43% | EPONYMOUS | 9 | Being the one something is named after |
| 43% | MOUSELEMUR | 10 | A species unique to Madagascar that is the world's smallest primate and one of the smallest mammals in the world: 2 wds. |
| 43% | PWR | 3 | "Watt is the unit of electric ___.": Abbr. |
| 43% | COULDA | 6 | "___ Been the One" (2006 Rihanna song) |
| 43% | LIE | 3 | A small one is white |
| 43% | WASP | 4 | The fairyfly (the smallest known insect in the world) is one |