| Start of an O'Neill title | 29 |
| Start of an O. Henry quote | 26 |
| Start of an oak | 15 |
| Start of an oath | 16 |
| Start of an objection | 21 |
| Start of an observation | 23 |
| Start of an observation by Bert L. Taylor | 41 |
| Start of an observation by Bill Gates | 37 |
| Start of an observation by Louis Auchincloss | 44 |
| Start of an observation by Tom Waits | 36 |
| Start of an ode's title | 27 |
| Start of an Odets title | 23 |
| Start of an office quip | 23 |
| Start of an oft-misquoted 1942 film line | 40 |
| Start of an oft-recited sequence | 32 |
| Start of an Ogden Nash rhyme | 28 |
| Start of an old Army recruiting line | 36 |
| Start of an old Army slogan | 27 |
| Start of an old boast | 21 |
| Start of an old motto | 21 |
| Start of an old news announcement | 33 |
| Start of an old poem | 20 |
| Start of an old proverb | 23 |
| Start of an old saw | 19 |
| Start of an old school song | 27 |
| Start of an old song lyric | 26 |
| Start of an old Wendy's slogan | 34 |
| Start of an online view, briefly | 32 |
| Start of an open letter from the puzzle constructor: "Dear ___, you seem a bit confused about what the V. P. does every day, so here are some helpful hints ..." | 170 |
| Start of an opinion | 19 |
| Start of an optical illusion quip | 33 |
| Start of an orator's quip | 29 |
| Start of an order to an attack dog | 34 |
| Start of an Oscar Wilde quote | 29 |
| Start of an unattributed rumor | 30 |
| Start of an unhealthy quip | 26 |
| Start of an unromantic geometry problem | 39 |
| Start of any Perry Mason title | 30 |
| Start of austerity | 18 |
| Start of Barney's theme song | 32 |
| Start of book title by Antoine de Saint-Exupéry | 50 |
| Start of Burma Shave Ad #I | 26 |
| Start of Burma Shave Ad #II | 27 |
| Start of Caesar's boast | 27 |
| Start of Caesar's claims | 28 |
| Start of Caesar's comment at a museum? | 42 |
| Start of Caesar's declaration | 33 |
| Start of Caesar's dispatch | 30 |
| Start of Caesar's final query | 33 |
| Start of Caesar's final statement | 37 |
| Start of Caesar's incredulous question | 42 |
| Start of Caesar's last gasp | 31 |
| Start of Caesar's message | 29 |
| Start of Caesar's query | 27 |
| Start of Caesar's report | 28 |
| Start of Cain's famous question | 35 |
| Start of Cain's infamous question | 37 |
| Start of Cain's query | 25 |
| Start of Cain's question | 28 |
| Start of Canada's motto en francais | 39 |
| Start of certain addresses | 26 |
| Start of Claudius' reign | 28 |
| Start of Clement Moore's famous poem | 40 |
| Start of Clement Moore's poem | 33 |
| Start of Colo. motto | 20 |
| Start of colonialism? | 21 |
| Start of Columbus's first voyage | 36 |
| Start of communications? | 24 |
| Start of corner or pillar | 25 |
| Start of D.C.'s ZIP codes or area code | 42 |
| Start of day at noon? | 21 |
| Start of Descartes' phrase | 30 |
| Start of Dickens title | 22 |
| Start of dirty pool? | 20 |
| Start of Dumas's trio's motto | 37 |
| Start of Ed McMahon's famous intro | 38 |
| Start of Edward VIII's abdication statement | 47 |
| Start of Egypt's official name | 34 |
| Start of eighth century | 23 |
| Start of either syllable in "ginger" | 46 |
| Start of el año | 18 |
| Start of el calendario | 22 |
| Start of esteem or analysis? | 28 |
| Start of evening light | 22 |
| Start of every hour? | 20 |
| Start of everything | 19 |
| Start of fairy tale | 19 |
| Start of Finnigin's cable to Flannigan | 42 |
| Start of first phrase meaning "approximately unequal"? | 64 |
| Start of four U.S. state names | 30 |
| Start of Fred Flintstone's cry | 34 |
| Start of Fred Flintstone's shout | 36 |
| Start of Frederick I's reign | 32 |
| Start of French toast | 21 |
| Start of Gertrude's quote | 29 |
| Start of Gleason's sarcastic laugh | 38 |
| Start of God's words to Moses | 33 |
| Start of Hamlet's "Yorick" speech | 47 |
| Start of hazarding a guess | 26 |
| Start of his wife's reply | 29 |