| One-hoss ___ | 12 |
| One-humper | 10 |
| One-hundred-meter sprint | 24 |
| One-hundredth of a balboa | 25 |
| One-hundredth of a mil, to a hood | 33 |
| One-hundredth part: Abbr. | 25 |
| One-I Nash subject | 18 |
| One-in-a- million | 17 |
| One-in-a-million | 16 |
| One-in-a-million thing | 22 |
| One-in-fifty status | 19 |
| One-inch news story | 19 |
| One-inch pencil, e.g. | 21 |
| One-inch pencil, for example | 28 |
| One-inch pencil, say | 20 |
| One-inch pencils, for example | 29 |
| One-inch putt, e.g. | 19 |
| One-kind connection | 19 |
| One-kind connector | 18 |
| One-kind link | 13 |
| One-L lama | 10 |
| One-L person, in an Ogden Nash poem | 35 |
| One-lane | 8 |
| One-lane highway annoyance? | 27 |
| One-legged ballet pose | 22 |
| One-legged camera stand | 23 |
| One-legged captain | 18 |
| One-legged captain of fiction | 29 |
| One-legged literary character | 29 |
| One-legged maneuver for those chocolate balls? | 46 |
| One-legged protagonist | 22 |
| One-legged support | 18 |
| One-legged whaler | 17 |
| One-lens eyewear | 16 |
| One-liner | 9 |
| One-liner deliverers | 20 |
| One-liner expert | 16 |
| One-liner from the pulpit? | 26 |
| One-liner legend Youngman | 25 |
| One-liner man Youngman | 22 |
| One-liner master | 16 |
| One-liner producer | 18 |
| One-liner that stings | 21 |
| One-liner, e.g. | 15 |
| One-liner, for one | 18 |
| One-liner, often | 16 |
| One-liners | 10 |
| One-liners, e.g. | 16 |
| One-man band | 12 |
| One-man band instrument, often | 30 |
| One-man band performances | 25 |
| One-man band's rendition, e.g. | 34 |
| One-man band, e.g. | 18 |
| One-man bands, e.g. | 19 |
| One-man boat | 12 |
| One-man Broadway hit of 1989 | 28 |
| One-man Broadway show | 21 |
| One-man flights | 15 |
| One-man performances | 20 |
| One-man Robert Morse play, 1990 | 31 |
| One-man show about Capote | 25 |
| One-man show about President Truman | 35 |
| One-man show about writer Capote | 32 |
| One-man show set in 1975 | 24 |
| One-man show, usually | 21 |
| One-man shows | 13 |
| One-man stint | 13 |
| One-man-army guys | 17 |
| One-many link | 13 |
| One-many separator | 18 |
| One-masted boat | 15 |
| One-masted boats | 16 |
| One-masted sailboat | 19 |
| One-masted ship | 15 |
| One-masted vehicle | 18 |
| One-master | 10 |
| One-masters of Mideast | 22 |
| One-mate state | 14 |
| One-million center | 18 |
| One-million connection | 22 |
| One-million connector | 21 |
| One-million connectors | 22 |
| One-million dividers? | 21 |
| One-million joiners | 19 |
| One-million link | 16 |
| One-millionth of a meter | 24 |
| One-name folk singer | 20 |
| One-name R&B artist | 23 |
| One-name singer of the 1960s | 28 |
| One-name soccer legend | 22 |
| One-name sports star | 20 |
| One-name star | 13 |
| One-name supermodel | 19 |
| One-named 'I Could Fall in Love' singer | 47 |
| One-named "I Do!" singer named for a Jackson | 54 |
| One-named "It's All About Me" singer | 50 |
| One-named "Kiss from a Rose" singer | 45 |
| One-named "Lonely" singer | 35 |
| One-named "May It Be" singer | 38 |
| One-named "Monument" singer | 37 |