| An oz. has six | 14 |
| An RN gives it | 14 |
| An S.S.R. | 9 |
| An S.S.R. language | 18 |
| An SASE is one | 14 |
| An SASE may accompany one | 25 |
| An SI unit | 10 |
| An SST | 6 |
| An SUV's is relatively low | 30 |
| An SUV's may be 12 | 22 |
| An udder thing | 14 |
| An ump is paid to make it | 25 |
| An umpire is behind it | 22 |
| An umpire makes it | 18 |
| An unbelievable tale | 20 |
| An unbreakable substance | 24 |
| An uncle of Joseph | 18 |
| An uncle of Mohammed | 20 |
| An uncle of Saul | 16 |
| An uncultivated person | 22 |
| An undesirable thing | 20 |
| An undesirable thing to be in | 29 |
| An unenjoyable experience | 25 |
| An unfinished figure 8 | 22 |
| An unfinished figure eight? | 27 |
| An unforgettable meal | 21 |
| An ungulate | 11 |
| An unknown quantity | 19 |
| An unlikely beginning | 21 |
| An unmannerly spectre | 22 |
| An unmentionable | 16 |
| An unsaturated hydrocarbon | 26 |
| An unsolicited script, e.g. | 27 |
| An unspecified amount | 21 |
| An unspecified number | 21 |
| An unthinking way | 17 |
| An Untouchable | 14 |
| An untouchable one | 18 |
| An unused item may be placed in it | 34 |
| An unwanted impression | 22 |
| An unwanted lasting impression | 30 |
| An unwelcome guest, to Galba | 28 |
| An Upanishad | 12 |
| An upright | 10 |
| An upright citizen, e.g. | 24 |
| An upright in a wall | 20 |
| An upright in house framing | 27 |
| An upside-down garbage can lid might be used as one | 51 |
| An upstairs girl | 16 |
| An urn, after an accident | 25 |
| An usher walks up and down it | 29 |
| An usher ___ | 12 |
| An X could represent it | 23 |
| An ___ but a goodie | 19 |
| An ___ effort | 13 |
| An ___ for dialogue | 19 |
| An ___ moment | 13 |
| An ___ music | 12 |
| An ___ nobility | 15 |
| An ___ of larks | 15 |
| An ___ of prevention ... | 24 |
| An ___ resemblance | 18 |
| An ___ single | 13 |
| An ___ the ground | 17 |
| An ___ the hole | 15 |
| An ___, city in Vietnam | 23 |
| An ____ favorite | 16 |
| An ____ of prevention . . . | 27 |
| An, as in "an enchilada" | 34 |
| An, in Ansbach | 14 |
| An, in Bonn | 11 |
| Ana and Claus | 13 |
| Ana Ivanovic and Novak Djokovic? | 32 |
| Ana or Barbara | 14 |
| Ana or Barbara start | 20 |
| Ana or Clara | 12 |
| Anaïs Nin output | 19 |
| Anaïs Nin, e.g.? | 19 |
| Anaïs Nin, for one | 21 |
| Anaïs ___ "The Novel of the Future" | 48 |
| Anaïs ___, "Delta of Venus" author | 47 |
| Anaïs, the writer | 20 |
| Anabaena | 8 |
| Anabaena or chlorella | 21 |
| Anabaena or nostoc | 18 |
| Anabaptist denomination | 23 |
| Anabaptist group | 16 |
| Anabaptist sect | 15 |
| Anabaptist Simons | 17 |
| Anabaptists, e.g. | 17 |
| Anabaptists, for one | 20 |
| Anachronism, e.g. | 17 |
| Anachronisms, perhaps | 21 |
| Anachronistic (but still common) phone verb | 43 |
| Anachronous | 11 |
| Anacin alternative | 18 |
| Anacin Aspirin Free competitor | 30 |
| Anacin rival | 12 |
| Anaconda | 8 |
| Anaconda menace | 18 |