| Start of communications? | 24 |
| Start of Columbus's first voyage | 36 |
| Start of colonialism? | 21 |
| Start of Colo. motto | 20 |
| Start of Clement Moore's poem | 33 |
| Start of Clement Moore's famous poem | 40 |
| Start of Claudius' reign | 28 |
| Start of certain addresses | 26 |
| Start of Canada's motto en francais | 39 |
| Start of Cain's question | 28 |
| Start of Cain's query | 25 |
| Start of Cain's infamous question | 37 |
| Start of Cain's famous question | 35 |
| Start of Caesar's report | 28 |
| Start of Caesar's query | 27 |
| Start of Caesar's message | 29 |
| Start of Caesar's last gasp | 31 |
| Start of Caesar's incredulous question | 42 |
| Start of Caesar's final statement | 37 |
| Start of Caesar's final query | 33 |
| Start of Caesar's dispatch | 30 |
| Start of Caesar's declaration | 33 |
| Start of Caesar's comment at a museum? | 42 |
| Start of Caesar's claims | 28 |
| Start of Caesar's boast | 27 |
| Start of Burma Shave Ad #II | 27 |
| Start of Burma Shave Ad #I | 26 |
| Start of book title by Antoine de Saint-Exupéry | 50 |
| Start of Barney's theme song | 32 |
| Start of austerity | 18 |
| Start of any Perry Mason title | 30 |
| Start of an unromantic geometry problem | 39 |
| Start of an unhealthy quip | 26 |
| Start of an unattributed rumor | 30 |
| Start of an Oscar Wilde quote | 29 |
| Start of an order to an attack dog | 34 |
| Start of an orator's quip | 29 |
| Start of an optical illusion quip | 33 |
| Start of an opinion | 19 |
| 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 online view, briefly | 32 |
| Start of an old Wendy's slogan | 34 |
| Start of an old song lyric | 26 |
| Start of an old school song | 27 |
| Start of an old saw | 19 |
| Start of an old proverb | 23 |
| Start of an old poem | 20 |
| Start of an old news announcement | 33 |
| Start of an old motto | 21 |
| Start of an old boast | 21 |
| Start of an old Army slogan | 27 |
| Start of an old Army recruiting line | 36 |
| Start of an Ogden Nash rhyme | 28 |
| Start of an oft-recited sequence | 32 |
| Start of an oft-misquoted 1942 film line | 40 |
| Start of an office quip | 23 |
| Start of an Odets title | 23 |
| Start of an ode's title | 27 |
| Start of an observation by Tom Waits | 36 |
| Start of an observation by Louis Auchincloss | 44 |
| Start of an observation by Bill Gates | 37 |
| Start of an observation by Bert L. Taylor | 41 |
| Start of an observation | 23 |
| Start of an objection | 21 |
| Start of an oath | 16 |
| Start of an oak | 15 |
| Start of an O. Henry quote | 26 |
| Start of an O'Neill title | 29 |
| Start of an O'Neill play | 28 |
| Start of an O'Casey opus | 28 |
| Start of an NBA paradox | 23 |
| Start of an N.B.A. game | 23 |
| Start of an magician's incantation | 38 |
| Start of an itinerary | 21 |
| Start of an Irwin Shaw title | 28 |
| Start of an ironic reminder | 27 |
| Start of an ironic quote from a certain Yale graduate | 53 |
| Start of an Irish flier | 23 |
| Start of an Irish carrier name | 30 |
| Start of an Iowa city | 21 |
| Start of an invocation | 22 |
| Start of an investor's quip | 31 |
| Start of an inventory quip | 26 |
| Start of an inventor's thought | 34 |
| Start of an invention | 21 |
| Start of an intermission? | 25 |
| Start of an intentional walk | 28 |
| Start of an instructional series | 32 |
| Start of an initiative | 22 |
| Start of an incantation | 23 |
| Start of an imaginary soliloquy | 31 |
| Start of an Illinois city | 25 |
| Start of an idle thought | 24 |
| Start of an idle question | 25 |
| Start of an idea | 16 |
| Start of an Ibsen title | 23 |
| Start of an eyewitness report | 29 |
| Start of an eyewitness account | 30 |
| Start of an explanation, perhaps | 32 |
| Start of an explanation for canine friendship | 45 |