| An illegal one could result in a fine | 37 |
| An illusory promise, metaphorically | 35 |
| An improvising jazz musician ___ | 32 |
| An insect and a musical group are in his name | 45 |
| An Inspector Calls playwright | 32 |
| An instruction impossible to fulfill | 36 |
| An insurance policy may not cover it | 36 |
| An invitation might include one: Abbr. | 38 |
| An ion that migrates to the anode | 33 |
| An Irish Literary Theatre founder | 33 |
| An NFL team is named for one of his works | 41 |
| An oath on it was once held to be inviolable | 44 |
| An object of Bohr's research | 32 |
| An observation game and an old TV series | 40 |
| An oenophile might detect a hint of this | 40 |
| An officer to avoid like the plague? | 36 |
| An official lang. of Switzerland | 32 |
| An official language of Pakistan | 32 |
| An official language of Singapore | 33 |
| An official language of Sri Lanka | 33 |
| An official language of the Northwest Territories | 49 |
| An old secretary might sit in one | 33 |
| An old syllable meaning "before" | 42 |
| An Olympic swimmer may have a long one | 38 |
| An Olympic swimmer needs a big one | 34 |
| An orator's may rise and fall | 33 |
| An original member of the Star Alliance | 39 |
| An original Star Alliance airline | 33 |
| An Oscar winner in "On Golden Pond" | 45 |
| An ostrich's weighs about three pounds | 42 |
| An ounce of this is worth the alternative | 41 |
| An unused item may be placed in it | 34 |
| An, as in "an enchilada" | 34 |
| Ana Ivanovic and Novak Djokovic? | 32 |
| Anaïs ___ "The Novel of the Future" | 48 |
| Anaïs ___, "Delta of Venus" author | 47 |
| Anachronistic (but still common) phone verb | 43 |
| Anaconda loser, almost certainly | 32 |
| Anagram and synonym of "evil" | 39 |
| Anagram for "End near? Why pay, Pa?" | 46 |
| Anagram for "Try Ma's charm, sire!" | 49 |
| Anagram of "notes," appropriately | 43 |
| Anagram of "notes," aptly | 35 |
| Anagram of a word in the preceding clue | 39 |
| Anagrammatic cousin of Alice or Lacie | 37 |
| Anagrammatically, she takes notes | 33 |
| Anagrammy-winning song about an escaped rodent? | 47 |
| Anagrammy-winning song from a sci-fi musical? | 45 |
| Anaheim Angels or New Jersey Devils | 35 |
| Anaheim players tripping over their own feet? | 45 |
| Anaheim's NHL team, formerly | 32 |
| Analgesic with a peppery sweet taste? | 37 |
| Analog ones won't work after June 12, 2009 | 46 |
| Analog oscilloscope parts: Abbr. | 32 |
| Analyst's upgrade of a George Clooney film? | 47 |
| Analyst's upgrade of a John Barrymore film? | 47 |
| Analyst's upgrade of a Karen Black film? | 44 |
| Analyst's upgrade of a Marsha Mason film? | 45 |
| Analyst's upgrade of a Robert Donat film? | 45 |
| Analyst's upgrade of a Sandra Bullock film? | 47 |
| Analyst's upgrade of an Alan Alda film? | 43 |
| Analyze before putting, as a green | 34 |
| Analyze further, as programming language syntax | 47 |
| Anarchist defendant with Vanzetti | 33 |
| Anarchist executed with Vanzetti | 32 |
| Anarchist Goldman or poet Lazarus | 33 |
| Anarchist in the news: 1920–27 | 37 |
| Anastasia's father, e.g. (Var.) | 35 |
| Anatole France novel made into an opera | 39 |
| Anatolian kingdom that pioneered coins | 38 |
| Anatomic test that only covers half the body? | 45 |
| Anatomical emergence in Biology, say? | 37 |
| Anatomical in-between area, slangily | 36 |
| Anatomically incorrect male doll | 32 |
| Ancestor of Grendel in "Beowulf" | 42 |
| Ancestor of the modern digital computer | 39 |
| Ancestor of the Q'ero Indians | 33 |
| Ancestor of today's computers | 33 |
| Ancestors for whom tribes are named | 35 |
| Ancestors in Darwin's theory | 32 |
| Ancestors of ballerina Maria Tallchief | 38 |
| Ancestors of the present-day Ossets | 35 |
| Ancestral spirits worshiped by Romans | 37 |
| Anchor that stayed put for many years | 37 |
| Anchor's job at the end of the news | 39 |
| Anchorman on "Mary Tyler Moore" | 41 |
| Ancient "keys of life" | 32 |
| Ancient "Queen of Heaven" | 35 |
| Ancient "Works and Days" poet | 39 |
| Ancient Aegean region west of Lydia | 35 |
| Ancient Asia Minor coastal region | 33 |
| Ancient Asia Minor country visited by St. Paul | 46 |
| Ancient Athens's Temple of ___ | 34 |
| Ancient Athens's Thirty Tyrants, e.g. | 41 |
| Ancient Balkan Peninsula dwellers | 33 |
| Ancient boundary between Romans and Carthaginians | 49 |
| Ancient capital of Macedonian kings | 35 |
| Ancient circular arrangement on Salisbury Plain | 47 |
| Ancient city at the mouth of the Tiber | 38 |
| Ancient city excavated by Karl Weber | 36 |