| 20 answers for: 45AA°, for 1 |
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| RANK | ANSWER | CLUE |
| ARCTANGENT | 45AA°, for 1 |
| TANGENT | 1, for 45AA° |
| TAN | 1, for 45AA°: Abbr. |
| ACUTE | Like a 45AA° or 60AA° angle |
| MORTAR | Weapon usually fired between a 45AA° and 90AA° angle |
| LCD | 12, for 1/3, 1/4 and 1/6: Abbr. |
| SQUAREROOT | 1 for 1 or 3 for 9, say |
| SUM | 2, for 1 and 1 |
| MARCH | A must for 1/4, proof all infantry's heading for review? (5,4) |
| PAST | A must for 1/4, proof all infantry's heading for review? (5,4) |
| MARCHPAST | A must for 1/4, proof all infantry's heading for review? |
| ABASH | What execs throw for #1 band (1,4) |
| DENIER | From the Latin for "silver coin", word originally for 1/12 of a French sou, later a unit of the fineness of fibres or yarns, especially when woven into stockings, tights and other hosiery (6) |
| OUNCE | From the Latin for "12th part", like the inch, a word for 1/12 of an imperial pound; or, any modicum (5) |
| DIGIT | Word for 1/12 of the diameter of the Sun or the Moon; a numeral; any one of the fingers, so called for the practice of counting on said pinkies, pointers or "Onkaparingas"; or, a finger-breadth (5) |
| ARMY | "Seven Nation ___" (#1 alt-rock hit for 1-A and her bandmate) |
| TONYBENN | Former MP for 1 (4,4) |
| TEACUP | Vessel for 1, 17 Ac |
| ARCSIN | 90 degrees for 1, in trig class |
| TENS | The "place" for "1" in 2019 |
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