| PRIME | 2 or 3, say |
| PRIME | 7 or 11, e.g. |
| PRIME | Amazon ___ (paid subscription service) |
| PRIME | Amazon ___ (subscription service) |
| PRIME | Amazon ___ Day (big online sale event) |
| PRIME | Amazon offering |
| PRIME | Amazon option |
| PRIME | Amazon service |
| PRIME | Amazon streaming platform |
| PRIME | Amazon subscription offering |
| PRIME | Amazon subscription program |
| PRIME | Amazon's paid subscription offering...or a synonym of "important" |
| PRIME | Amazon's paid subscription service |
| PRIME | Amazon's subscription program |
| PRIME | Amazon's subscription service |
| PRIME | Beef rating |
| PRIME | Best of all |
| PRIME | Best part of existence? |
| PRIME | Best quality |
| PRIME | Best rate |
| PRIME | Career peak |
| PRIME | Central |
| PRIME | Choice |
| PRIME | Choice; top-notch |
| PRIME | Cut of beef |
| PRIME | Fed concern |
| PRIME | Finest; choice |
| PRIME | First rate |
| PRIME | First-class |
| PRIME | First-rate |
| PRIME | Foremost |
| PRIME | Fundamental |
| PRIME | Get ready |
| PRIME | Grade A |
| PRIME | Heyday |
| PRIME | High beef rating |
| PRIME | Highest U.S.D.A. beef grade |
| PRIME | Highest beef grade |
| PRIME | Highest grade of steak |
| PRIME | Highest rating |
| PRIME | High-quality |
| PRIME | High-quality, as beef |
| PRIME | Important sort of number |
| PRIME | In the ___ of life |
| PRIME | Kind of minister or suspect |
| PRIME | Kind of rate or suspect |
| PRIME | Like 2 and 5 but not 25 |
| PRIME | Like 2, 3 and 23 |
| PRIME | Like 2003, 2011 and 2017 |
| PRIME | Like 2017 and 2027 |
| PRIME | Like 2017 but not 2018 |
| PRIME | Like 2027 and 2029, but not 2025 |
| PRIME | Like 3 and 5, but not 35 |
| PRIME | Like 3, 7 or 23 |
| PRIME | Like a suspect that isn't a "second" guess? |
| PRIME | Like numbers important in cryptography |
| PRIME | Like some numbers and rib |
| PRIME | Like the number 17 |
| PRIME | Like the number 19 |
| PRIME | Like the number 23 |
| PRIME | Like the number of this clue |
| PRIME | Like the numbers 11, 13 and 17 |
| PRIME | Like the numbers 13 and 17, but not 33 |
| PRIME | Like the numbers 2, 3, and 5 |
| PRIME | Like the numbers 3, 5, 7, 11, etc. |
| PRIME | Like the two 40-Across in the grid for this answer |
| PRIME | Like top-quality beef |
| PRIME | Main sort of number |
| PRIME | Meat grade |
| PRIME | Meryl Streep movie |
| PRIME | Minister type |
| PRIME | Most important |
| PRIME | Muriel Spark's "The ___ of Miss Jean Brodie" |
| PRIME | Natural number divisible by 1 and itself only |
| PRIME | Numbers such as 3, 5, 7, and 13 |
| PRIME | Of highest quality |
| PRIME | Of the best quality |
| PRIME | Of the highest quality |
| PRIME | Optimus ___, robot from the "Transformers" franchise, voiced by Peter Cullen in the original animated series |
| PRIME | Paid subscription offered by Amazon |
| PRIME | Principal |
| PRIME | Ready |
| PRIME | Resident at Ottawa's 24 Sussex Drive |
| PRIME | Second to none |
| PRIME | See 1-Across |
| PRIME | Significant sort of number |
| PRIME | Springtime of life |
| PRIME | Superior beef grade |
| PRIME | Superior beef rating |
| PRIME | The best years of your life, and a word that rhymes with "time" |
| PRIME | The largest known one is 23,249,425 digits long |
| PRIME | The largest known one is 2^(82,589,933) - 1 |
| PRIME | Top quality |
| PRIME | Top-notch |
| PRIME | Top-quality |
| PRIME | Top-quality, as beef |
| PRIME | Two or three, e.g. |
| PRIME | Two, for one |
| PRIME | Type of number; done to hand pumps before use |
| PRIME | USDA meat grade |
| PRIME | With 66-Across, peak evening hours ... or a hint to the answers to the starred clues |
| PRIME | Word with meridian or minister |
| PRIME | Word with number or time |
| PRIME | Word with rib or minister |
| PRIME | Word with rib or number |
| PRIME | Word with rib or time |
| PRIME | Word with time or rib |
| PRIME | __ minister (British leader) |
| PRIME | __ numbers; 2,3,5,7,11, etc. |
| PRIME | ___ Day, annual deal event that was first held on Amazon's 20th anniversary in 2015 |
| PRIME | ___ minister |
| PRIME | ___ minister (British leader) |
| PRIME | ____ minister |