| Lightest element | 16 |
| It's always number one | 26 |
| First item on a certain table | 29 |
| Element in water | 16 |
| Deuterium is an isotope of it | 29 |
| 1 in a table setting | 20 |
| #1 on a table | 13 |
| Margarine, e.g. | 15 |
| It was first tested in 1952 | 27 |
| Subject of 1950s testing | 24 |
| "Element #1 Gives Atrocious Performance on Broadway!" | 63 |
| Decomposing, chemically | 23 |
| Submarine detecting device | 26 |
| Health spas, to Brits | 21 |
| Seaplane attachment | 19 |
| Oreo alternative | 16 |
| Sunshine cookie | 15 |
| Original Oreo competitor | 24 |
| Longtime Oreo competitor | 24 |
| Part of NaOH (just to give The Snack's old rival a smidgen of equal time) | 77 |
| Cure with cookies? | 18 |
| Like citric acid and lactic acid | 32 |
| Alpha ___ acids (cosmetic ingredients) | 38 |
| Antihistaminic drug | 19 |
| Martha of "Some Came Running" | 39 |
| Actress Martha who played Sinatra's love interest in "Some Came Running" | 86 |
| Actress Martha of "Some Came Running" | 47 |
| Actress Martha from Fort Worth | 30 |
| "Jezebel" actress on TV: 1950's | 45 |
| Greek goddess of health | 23 |
| Healthy regimen | 15 |
| Sanitary measures | 17 |
| Seinfeld obsession | 18 |
| Junior high health class topic | 30 |
| It's good for your health | 29 |
| High school health topic | 24 |
| Healthy routine | 15 |
| Good health habits | 18 |
| Food-service concern | 20 |
| Dental or oral follower | 23 |
| Cleanliness | 11 |
| Clean freak's concern | 25 |
| Health practices | 16 |
| Cleanliness regimens | 20 |
| Dental worker | 13 |
| Making haste | 12 |
| Tree toad | 9 |
| Matter, in philosophy | 21 |
| Wood: Comb. form | 16 |
| Wood: Prefix | 12 |
| Of an early Greek doctrine | 26 |
| Maidenhead | 10 |
| God of marriage | 15 |
| Marriage song | 13 |
| Order of ants | 13 |
| "Get Smart" robot | 27 |
| Scandinavian giant | 18 |
| Where to find "The Old Rugged Cross" | 46 |
| Service manual? | 15 |
| Church choir member's need | 30 |
| Church staples | 14 |
| Praised in song | 15 |
| Chrissie of the Pretenders | 26 |
| Singer Chrissie | 15 |
| Chrissie in the Rock and Roll Hall of Fame | 42 |
| "Back on the Chain Gang" singer | 41 |
| Swine: Prefix | 13 |
| Tongue bone | 11 |
| Bone by the tongue | 18 |
| Bone at base of the tongue | 26 |
| Under: Prefix | 13 |
| Triangle part: Abbr. | 20 |
| Prefix meaning "less than normal" | 43 |
| Supposition: Abbr. | 18 |
| Right-triangle leg: Abbr. | 25 |
| Right triangle part: Abbr. | 26 |
| Part of a triangle: Abbr. | 25 |
| Part of a rt. triangle | 22 |
| Longest side of a rt. triangle | 30 |
| Long side of a rt. triangle | 27 |
| Connector of legs: Abbr. | 24 |
| Conjectural: Abbr. | 18 |
| Really enthused | 15 |
| Flavor Flav of Public Enemy, e.g. | 33 |
| Unusually energetic | 19 |
| Paul Bunyan device | 18 |
| "I could eat a horse," e.g. | 37 |
| ... using ___: “Mary’s microscopic lamb / So white, it struck me blind!” | 84 |
| Extravagant exaggerations | 25 |
| Four-dimensional figure | 23 |
| Economic woe | 12 |
| Unfinished poem by Keats | 24 |
| "Legend of Zelda" character, over-caffeinated | 55 |
| They're often underlined | 28 |
| Cyberspace connections | 22 |
| Wildcat that can't sit still? | 33 |
| Fan letter? | 11 |
| Type of conic section | 21 |
| Unstable particles with great mass | 34 |
| PR flaks | 8 |