| An HR results in at least one | 29 |
| An I.Q. of about 100, e.g. | 26 |
| An Icelandic literary work | 26 |
| An Icelandic monetary unit | 26 |
| An Idahoan might hoe one | 24 |
| An ideally perfect place | 24 |
| An ideologue might have one | 27 |
| An Imogene who made the scene | 29 |
| An in-law of the Borgias | 24 |
| An incarnation of Vishnu | 24 |
| An inch equals 1,000 of these | 29 |
| An inch equals 2.54 of these | 28 |
| An inch equals 25.4 of these | 28 |
| An Indian accepted his Oscar | 28 |
| An Indian may be in it | 22 |
| An Indian may be in one | 23 |
| An Indo-Chinese people | 22 |
| An Indo-European language | 25 |
| An inferred conclusion | 22 |
| An Ingmar protégée | 24 |
| An inning's three? | 22 |
| An inro may be attached to it | 29 |
| An insecticide, for short | 25 |
| An inset might depict one | 25 |
| An inspiration to Beethoven | 27 |
| An integral can compute it | 26 |
| An intelligence agent ___ | 25 |
| An intermission follower | 24 |
| An Internet address ender | 25 |
| An invasion or hostile attack | 29 |
| An inventor of the microphone | 29 |
| An inventor's middle name | 29 |
| An inventor's monogram | 26 |
| An investment, perhaps | 22 |
| An IRA may be part of it | 24 |
| An O may symbolize one | 22 |
| An O.K. Corral gunfighter | 25 |
| An objective for Sally? | 23 |
| An octahedron has twelve | 24 |
| An off-ramp may lead to one | 27 |
| An officer and a gentleman? | 27 |
| An officer below a lt. | 22 |
| An official enforces it | 23 |
| An official lang. of Kenya | 26 |
| An official lang. of Malta | 26 |
| An official lang. of Tonga | 26 |
| An official under Nero | 22 |
| An old Burmese capital | 22 |
| An old couple fell in it | 24 |
| An old flame's pastime? | 27 |
| An old one may need a key | 25 |
| An old story from Paul? | 23 |
| An older brother of Seth | 24 |
| An older one may be beaten | 26 |
| An Olivier co-star: 1939 | 24 |
| An Olympian may thrust it | 25 |
| An Olympics site: 1988 | 22 |
| An Olympics star in 1936 | 24 |
| An omega stands for it | 22 |
| An omen might do it well | 24 |
| An operator may call on one | 27 |
| An orange, minus the juice | 26 |
| An orchestra tunes to one | 25 |
| An order of herbaceous plants | 29 |
| An order of Hindu monks | 23 |
| An order to a helmsman | 22 |
| An original eurozone member | 27 |
| An original Mouseketeer | 23 |
| An original tribe of Israel | 27 |
| An Oscar is mostly this | 23 |
| An Oscar role for Hanks | 23 |
| An Oscar winner in 1960 | 23 |
| An Oscar winner in 1977 | 23 |
| An Oscar winner in 1986 | 23 |
| An Oscar winner: 1931-32 | 24 |
| An outfielder may call it | 25 |
| An SASE may accompany one | 25 |
| An SUV's may be 12 | 22 |
| An ump is paid to make it | 25 |
| An umpire is behind it | 22 |
| An unbreakable substance | 24 |
| An uncultivated person | 22 |
| An undesirable thing to be in | 29 |
| An unenjoyable experience | 25 |
| An unfinished figure 8 | 22 |
| An unfinished figure eight? | 27 |
| An unmannerly spectre | 22 |
| An unsaturated hydrocarbon | 26 |
| An unsolicited script, e.g. | 27 |
| An unwanted impression | 22 |
| An unwelcome guest, to Galba | 28 |
| An upright citizen, e.g. | 24 |
| An upright in house framing | 27 |
| An urn, after an accident | 25 |
| An usher walks up and down it | 29 |
| An X could represent it | 23 |
| An ___ of prevention ... | 24 |
| An ___, city in Vietnam | 23 |
| An ____ of prevention . . . | 27 |
| Anabaptist denomination | 23 |