| 100% | SLIM | 4 | Like a one-in-a-million chance |
| 97% | RARE | 4 | Like one in a million |
| 81% | RARAAVIS | 8 | One in a million |
| 81% | RAREBIRD | 8 | One in a million |
| 81% | RARE | 4 | One in a million |
| 79% | ODDS | 4 | One in a million, e.g. |
| 79% | CARRYOVER | 9 | Like a one in addition, often |
| 78% | RAREGEM | 7 | One in a million, so to speak |
| 77% | ZEROS | 5 | All but one in a million? |
| 76% | RARE | 4 | With 17-Across, one in a million |
| 76% | NTH | 3 | Like one in a series |
| 74% | ETS | 3 | Aliens, like the one in a Spielberg movie: Abbr. |
| 74% | NOT | 3 | "___ in a million years!" (no chance) |
| 74% | NOT | 3 | "___ in a million years!" ("No chance!") |
| 74% | SAFE | 4 | Like one in a panic room, presumably |
| 74% | ARO | 3 | Like one in a queerplatonic relationship, briefly |
| 73% | ETS | 3 | Aliens, like the one in a 1982 Spielberg movie: Abbr. |
| 73% | ARO | 3 | Like one in a queerplatonic relationship, for short |
| 72% | LONGSHOT | 8 | Attempt that might have a one-in-a-million chance: 2 wds. |
| 71% | NUTTY | 5 | Like a fruitcake, in more ways than one |
| 71% | NTH | 3 | Like a certain one in line |
| 71% | UNDERTHEWEATHER | 15 | Like one caught in a storm? |
| 70% | NOHOPERS | 8 | Ones without a chance in the world |
| 70% | BEWHISKERED | 11 | Like one in need of a shave |
| 69% | ADULT | 5 | One whose voice sounds like a trombone, in "Peanuts" cartoons |
| 69% | DAME | 4 | There's nothing like one, in a song |
| 69% | DOA | 3 | Like a proposal in Congress that has zero chance of passing, in brief |
| 68% | URN | 3 | Fancy vase, like the Grecian one in a famous 50-Down |
| 68% | GROGGY | 6 | Like a drunken sailor, in more ways than one? |
| 68% | FOULPROOF | 9 | Like one playing basketball in a suit of armor? |