| One lighting up at lunch? | 25 |
| One libeling | 12 |
| One liable to get hurt | 22 |
| One level below the majors | 26 |
| One level below sharpshooter | 28 |
| One letting the chat out of the bag | 35 |
| One letting off steam | 21 |
| One letting go | 14 |
| One letter changes a Tom to an Ernie | 36 |
| One letter changes a Ross to a Juan | 35 |
| One letter changes a Gilda to a Rita | 36 |
| One letter changes a Bruce to a Mel | 35 |
| One less? | 9 |
| One less than vier | 18 |
| One less than une douzaine | 26 |
| One less than twice | 19 |
| One less than tetra- | 20 |
| One less than septi- | 20 |
| One less than quattro | 21 |
| One less than quadri- | 21 |
| One less than never? | 20 |
| One less than hexa- | 19 |
| One less than a crowd | 21 |
| One less than a bogey | 21 |
| One less than "tres" | 30 |
| One less than "quattro" | 33 |
| One less than "ocho" | 30 |
| One less from never? | 20 |
| One lengthened by mascara | 25 |
| One lending a helping hand, essentially | 39 |
| One lending a helping hand | 26 |
| One leg -- time | 15 |
| One left standing | 17 |
| One left shaken? | 16 |
| One left out of a stag party? | 29 |
| One left holding the bag | 24 |
| One left hanging after an election? | 35 |
| One led astray | 14 |
| One leaving the union | 21 |
| One leaving the country | 23 |
| One leaving the band to pursue other interests? | 47 |
| One leaving space | 17 |
| One leaving one country to settle in another | 44 |
| One leaving its mark | 20 |
| One leaving in the spring | 25 |
| One leaving in spring? | 22 |
| One leaving home, perhaps | 25 |
| One leaving cash on the table? | 30 |
| One leaving before a storm | 26 |
| One leaving a will | 18 |
| One leaving a wake, perhaps | 27 |
| One leaving a wake | 18 |
| One leaving a track mark | 24 |
| One leaving a personnel director's office, maybe | 52 |
| One leaving | 11 |
| One least likely to pick up the tab | 35 |
| One learning to walk | 20 |
| One learning to lie, perhaps | 28 |
| One learning the ropes | 22 |
| One learning method | 19 |
| One learning how to refine oils? | 32 |
| One learning about the birds and the bees? | 42 |
| One leads to Loch Lomond | 24 |
| One leading to temptation? | 26 |
| One leading the German bakers' guild? | 41 |
| One leading the flock | 21 |
| One leading lady? | 17 |
| One leading a spartan lifestyle | 31 |
| One leading a cheer, perhaps | 28 |
| One leading a chase | 19 |
| One leading a charmed life? | 27 |
| One leading a bull session? | 27 |
| One laying it on thick | 22 |
| One laying down sticky stuff | 28 |
| One last time | 13 |
| One lap, maybe, in a race | 25 |
| One lap for the minute hand | 27 |
| One lap around the track, say | 29 |
| One language spoken in Thailand | 31 |
| One language spoken in India (Var.) | 35 |
| One landing with a turned-up face | 33 |
| One lacking social graces | 25 |
| One lacking savvy | 17 |
| One lacking normal pigmentation | 31 |
| One lacking noblesse oblige | 27 |
| One lacking manners | 19 |
| One lacking in pigment | 22 |
| One lacking in conviction | 25 |
| One lacking grace | 17 |
| One lacking foresight? | 22 |
| One lacking experience | 22 |
| One lacking courage | 19 |
| One lacking bucks? | 18 |
| One lacking bias | 16 |
| One known to saw wood | 21 |
| One known to hit the bottle | 27 |
| One known for talking back? | 27 |
| One known for taking pictures | 29 |
| One known for stick-to-it-iveness? | 34 |
| One known for spouting off | 26 |