| One of the astronauts | 21 |
| One of the Astors | 17 |
| One of the asteroids | 20 |
| One of the Astaires | 19 |
| One of the ASPCA's "Ways to Help" | 47 |
| One of the arums | 16 |
| One of the arts | 15 |
| One of the Arroes | 17 |
| One of the Arquettes | 20 |
| One of the Arnazes | 18 |
| One of the Army brass | 21 |
| One of the Arkins | 17 |
| One of the Argonauts | 20 |
| One of the archangels | 21 |
| One of the apostles: Abbr. | 26 |
| One of the apostles | 19 |
| One of the Apodes | 17 |
| One of the ants | 15 |
| One of the Antilles | 19 |
| One of the anniversaries | 24 |
| One of the angels on "Charlie's Angels" | 53 |
| One of the Angels | 17 |
| One of the Andrews Sisters | 26 |
| One of the Andreanofs | 21 |
| One of the Andersons | 20 |
| One of the amino acids | 22 |
| One of the Americas (abbr) | 26 |
| One of the Americas | 19 |
| One of the Ameche brothers | 26 |
| One of the Alps | 15 |
| One of the Alous | 16 |
| One of the Alou brothers | 24 |
| One of the Alosa | 16 |
| One of the Allmans | 18 |
| One of the Allman Brothers is way too simple? | 45 |
| One of the Allman Brothers | 26 |
| One of the Allies of W.W. II | 28 |
| One of the Allies | 17 |
| One of the Allens | 17 |
| One of the Alis | 15 |
| One of the Algonquin tribes | 27 |
| One of the Aleutians | 20 |
| One of the Aleutian Islands | 27 |
| One of the Alcotts | 18 |
| One of the albums that defined "grunge" | 49 |
| One of the Alaskans | 19 |
| One of the Alans | 16 |
| One of the air signs | 20 |
| One of the ages | 15 |
| One of the Aesir | 16 |
| One of the Adlai Stevensons | 27 |
| One of the Adamses | 18 |
| One of the actinide series | 26 |
| One of the acting Wilsons | 25 |
| One of the acting Roberts family | 32 |
| One of the acting Bridges | 25 |
| One of the acting Baldwins | 26 |
| One of the ABCs | 15 |
| One of the ABC Powers | 21 |
| One of the ABC islands | 22 |
| One of the 8 main pts. of speech | 32 |
| One of the 6 noble gases | 24 |
| One of the 5 W's | 20 |
| One of the 400 | 14 |
| One of the 4-H Club's H's | 33 |
| One of the 30 Dow Jones industrials | 35 |
| One of the 30 companies that makes up the Dow Jones Industrial Average | 70 |
| One of the 30 companies that comprise the Dow Jones Industrial Average | 70 |
| One of the 30 companies comprising the Dow Jones Industrial Average | 67 |
| One of the 3 B's | 20 |
| One of the 2008 Olympic mascots | 31 |
| One of the 20 brightest stars | 29 |
| One of the 1960s Rams' Fearsome Foursome | 44 |
| One of the 14 Holy Helpers | 26 |
| One of the 13: Abbr. | 20 |
| One of the 13 orig. colonies | 28 |
| One of the 13 colonies: Abbr. | 29 |
| One of the 12s in 12/12/12 | 26 |
| One of the 12 tribes of Israel | 30 |
| One of the 12 tribes | 20 |
| One of the 11 official languages of South Africa | 48 |
| One of the 10 lowest digits? | 28 |
| One of the 10 brightest stars | 29 |
| One of the "virgins" of "Two Virgins" | 57 |
| One of the "Two Virgins" | 34 |
| One of the "tools of ignorance" | 41 |
| One of the "three little people" whose problems "don't amount to a hill of beans in this crazy world," in a classic film | 144 |
| One of the "three faces of Eve" | 41 |
| One of the "three B's" | 36 |
| One of the "Ten Worst Automobiles of 2007" as ranked by thetruthaboutcars.com | 87 |
| One of the "Taxi" cabbies | 35 |
| One of the "Stooges" | 30 |
| One of the "South Park" boys | 38 |
| One of the "She's Gone" singers | 45 |
| One of the "Rocky" films | 34 |
| One of the "Real Housewives of Atlanta" | 49 |
| One of the "Publishers of Cheap and Popular Pictures" | 63 |
| One of the "proud" items in a Murray book | 51 |
| One of the "P"s in ppg | 32 |
| One of the "north forty" | 34 |