| One in a queue | 14 |
| One in a prompt box | 19 |
| One in a powerful house | 23 |
| One in a pool, perhaps | 22 |
| One in a pool | 13 |
| One in a pod | 12 |
| One in a pit at a concert | 25 |
| One in a pit | 12 |
| One in a pinch | 14 |
| One in a pier group | 19 |
| One in a pic | 12 |
| One in a phone bill list | 24 |
| One in a penalty box | 20 |
| One in a pen | 12 |
| One in a pack? | 14 |
| One in a pack | 13 |
| One in a onesie | 15 |
| One in a one-on-one session | 27 |
| One in a network? | 17 |
| One in a network | 16 |
| One in a needle program | 23 |
| One in a multiple birth, briefly | 32 |
| One in a multiple birth | 23 |
| One in a mobile home? | 21 |
| One in a mob scene? | 19 |
| One in a mission | 16 |
| One in a mint? | 14 |
| One in a million, say | 21 |
| One in a million, e.g. | 22 |
| One in a million | 16 |
| One in a military march? | 24 |
| One in a mil.? | 14 |
| One in a mil. | 13 |
| One in a midlife crisis, perhaps | 32 |
| One in a mess? | 14 |
| One in a maze | 13 |
| One in a mare's nest? | 25 |
| One in a longstanding fight | 27 |
| One in a long line of workers? | 30 |
| One in a litter basket, perhaps | 31 |
| One in a litter | 15 |
| One in a line of 36 | 19 |
| One in a line at J.F.K. or La Guardia | 37 |
| One in a line | 13 |
| One in a Lincoln quartet? | 25 |
| One in a leaking boat | 21 |
| One in a Latin trio | 19 |
| One in a kitchen stack | 22 |
| One in a Kindergarten? | 22 |
| One in a juvenile court? | 24 |
| One in a jar | 12 |
| One in a jam? | 13 |
| One in a jam, maybe | 19 |
| One in a hurry | 14 |
| One in a hundred: Abbr. | 23 |
| One in a hundred, in D.C. | 25 |
| One in a hundred | 16 |
| One in a humming swarm | 22 |
| One in a hospital room display | 30 |
| One in a hood | 13 |
| One in a home-wrecking crew? | 28 |
| One in a hole | 13 |
| One in a highchair | 18 |
| One in a high-risk insurance group | 34 |
| One in a herd | 13 |
| One in a heat | 13 |
| One in a head office (abbr.) | 28 |
| One in a harness | 16 |
| One in a hand | 13 |
| One in a habit | 14 |
| One in a grocery cart | 21 |
| One in a gray suit | 18 |
| One in a gaggle | 15 |
| One in a fury | 13 |
| One in a fright wig | 19 |
| One in a four-part harmony | 26 |
| One in a fold | 13 |
| One in a flock | 14 |
| One in a flight | 15 |
| One in a flat | 13 |
| One in a fine mess? | 19 |
| One in a fighting chair | 23 |
| One in a dugout | 15 |
| One in a dozen old family lines | 31 |
| One in a dozen difficult jobs | 29 |
| One in a dozen constellations | 29 |
| One in a dozen | 14 |
| One in a dependent relationship? | 32 |
| One in a deep-fried side | 24 |
| One in a dark suit | 18 |
| One in a dangerous school | 25 |
| One in a D.A.'s office | 26 |
| One in a cruiser | 16 |
| One in a cruise ship line | 25 |
| One in a crowded womb | 21 |
| One in a crowded delivery room | 30 |
| One in a crowd scene | 20 |
| One in a crowd | 14 |
| One in a crosswalk, for short | 29 |
| One in a crew | 13 |