| One below a second lieut. | 25 |
| One bending to and fro | 22 |
| One benefit of a vacation | 25 |
| One bent while genuflecting | 27 |
| One between second and third | 28 |
| One between the covers, often | 29 |
| One between two cardinals? | 26 |
| One big-time broadcaster | 24 |
| One billion years to Hubble | 28 |
| One billion years (Var.) | 24 |
| One billion years, in geology | 29 |
| One blessed with ESP, perhaps | 29 |
| One blowing among the reeds | 27 |
| One blowing his own horn | 24 |
| One blowing his own horn? | 25 |
| One bordering on divine | 23 |
| One born in the '50s | 24 |
| One born on Christmas Day | 25 |
| One bounce, in baseball | 23 |
| One bounce, on the diamond | 26 |
| One bounced by a bouncer | 24 |
| One bound to hold notes? | 24 |
| One bound to work without pay | 29 |
| One breaking down in school? | 28 |
| One breaking new ground? | 24 |
| One brick shy of a load | 23 |
| One bringing home the bacon | 27 |
| One bringing up the rear | 24 |
| One broadcaster, or two poets | 29 |
| One building buildings? | 23 |
| One built for Broadway | 22 |
| One busy during a rally | 23 |
| One busy in a leaky boat | 24 |
| One busy with a hammer | 22 |
| One busy with paper work | 24 |
| One buying stolen goods | 23 |
| One buying time, perhaps | 24 |
| One by one the klutz _____ | 26 |
| One called to the bar (abbr.) | 29 |
| One called upon to decide | 25 |
| One called upon to talk? | 24 |
| One calling at peak times? | 26 |
| One calling strikes and balls | 29 |
| One calling technical support | 29 |
| One calling the kettle black | 28 |
| One calling the shots? | 22 |
| One can be a whole lot | 22 |
| One can be called on it | 23 |
| One can be loose or tight | 25 |
| One can be shown to you | 23 |
| One can stake it or file it | 27 |
| One can stand to lose it | 24 |
| One Capp of the comics | 22 |
| One captain of the Enterprise | 29 |
| One carried Sinbad to safety | 28 |
| One carrying a back pack | 24 |
| One carrying dust, maybe | 24 |
| One carrying handcuffs | 22 |
| One carrying off carrion | 24 |
| One carrying on a trade | 23 |
| One cast out of paradise | 24 |
| One casting aspersions | 22 |
| One catching a lot of waves | 27 |
| One catching a ram's eye | 28 |
| One catching some waves? | 24 |
| One catching some z's | 25 |
| One caught by border patrol | 27 |
| One caught in a police sting | 28 |
| One caught in the headlights | 28 |
| One caught off base, perhaps | 28 |
| One cause of a close shave | 26 |
| One cause of blackouts | 22 |
| One cause of corruption | 23 |
| One cause of daytime fatigue | 28 |
| One cause of deforestation | 26 |
| One cause of food poisoning | 27 |
| One cause of heavy breathing | 28 |
| One cause of trembling | 22 |
| One chained to a counter | 24 |
| One chained to a desk, say | 26 |
| One charring something | 22 |
| One cheating on another, e.g. | 29 |
| One checking crossings | 22 |
| One checking things out | 23 |
| One cheered in Baltimore | 24 |
| One choosing a sweater, e.g.? | 29 |
| One clapping at a circus? | 25 |
| One clearing dead leaves | 24 |
| One club, two hearts, etc. | 26 |
| One color in the French flag | 28 |
| One color of the rainbow | 24 |
| One coming down the aisle? | 26 |
| One coming out of its shell? | 28 |
| One coming out, briefly | 23 |
| One commemorative feast | 23 |
| One committing grave crimes? | 28 |
| One completely lacking morals | 29 |
| One completes a monument | 24 |
| One concern of a derby bettor | 29 |
| One concern of a grammarian | 27 |