| One of a score's two | 24 |
| One of a Scrabble 100 | 21 |
| One of a sea-going trio | 23 |
| One of a seagoing trio | 22 |
| One of a seaworthy trio | 23 |
| One of a secretive trio | 23 |
| One of a semana's seven | 27 |
| One of a semi's eighteen | 28 |
| One of a series | 15 |
| One of a series of joint Soviet/U.S. space satellites | 53 |
| One of a series of recurring actions | 36 |
| One of a series of rows | 23 |
| One of a series of steps | 24 |
| One of a set for toddlers | 25 |
| One of a set in the kitchen | 27 |
| One of a set of 50 | 18 |
| One of a set of 64, maybe | 25 |
| One of a set of steps | 21 |
| One of a set of towels | 22 |
| One of a sheepdog's watch | 29 |
| One of a Sheridan pair | 22 |
| One of a shooting trio | 22 |
| One of a short seven | 20 |
| One of a show biz threesome | 27 |
| One of a silent force? | 22 |
| One of a singing trio | 21 |
| One of a skeletal pair | 22 |
| One of a skyscraper's many | 30 |
| One of a slapstick trio | 23 |
| One of a smartphone accessory pair | 34 |
| One of a snorkeler's pair | 29 |
| One of a soft-soled pair | 24 |
| One of a standard group of five | 31 |
| One of a starter's instructions | 35 |
| One of a state's two, briefly | 33 |
| One of a state's two, for short | 35 |
| One of a storied threesome | 26 |
| One of a storied trio | 21 |
| One of a strand | 15 |
| One of a study group? | 21 |
| One of a suit | 13 |
| One of a Sunday evening foursome | 32 |
| One of a swarm | 14 |
| One of a swimmer's pair | 27 |
| One of a swinging pair? | 23 |
| One of a swiveled pair | 22 |
| One of a symbiotic pair | 23 |
| One of a Taoist twosome | 23 |
| One of a tbsp.'s three | 26 |
| One of a team of eight | 22 |
| One of a temporary 20 in children | 33 |
| One of a Tenn. eleven | 21 |
| One of a tennis pair | 20 |
| One of a thousand in a Jane Smiley title | 40 |
| One of a threesome | 18 |
| One of a tight pair | 19 |
| One of a tiny septet | 20 |
| One of a Tolstoi pair | 21 |
| One of a toon septet | 20 |
| One of a top suit | 17 |
| One of a touchy bundle | 22 |
| One of a tour crew | 18 |
| One of a traditional elite | 26 |
| One of a traveling musical trio | 31 |
| One of a triangle's three | 29 |
| One of a tricycle's trio | 28 |
| One of a tricycle's twosome | 31 |
| One of a trio | 13 |
| One of a trio by Caesar | 23 |
| One of a trio in "The Twelve Days of Christmas" | 57 |
| One of a trio in a children's poem | 38 |
| One of a trio in a tub | 22 |
| One of a trio in “The Mikado” | 37 |
| One of a trio in Scandinavian myth | 34 |
| One of a trio of black keys | 27 |
| One of a trio that weighed anchor in 1492 | 41 |
| One of a tub trio | 17 |
| One of a Turkic people | 22 |
| One of a TV twosome | 19 |
| One of a typical schooner's pair | 36 |
| One of a vacationing busload | 28 |
| One of a Valentine dozen | 24 |
| One of a Valentine's Day dozen | 34 |
| One of a vaudeville seven | 25 |
| One of a Vegas pair | 19 |
| One of a Vegas twosome | 22 |
| One of a very close pair of brothers | 36 |
| One of a very large seven | 25 |
| One of a very special delivery | 30 |
| One of a villainous group in "The Lion King" | 54 |
| One of a violin quartet | 23 |
| One of a vitamin complex | 24 |
| One of a vivacious pair | 23 |
| One of a vocal pair | 19 |
| One of a vocal quartet | 22 |
| One of a wad | 12 |
| One of a warming pair | 21 |
| One of a watery quintet | 23 |
| One of a watery seven | 21 |
| One of a weatherman's three H's | 39 |