| Acid identifier, perhaps? | 25 |
| Acid in gastric juice, chemically | 33 |
| Acid in lemons | 14 |
| Acid in milk | 12 |
| Acid in protein | 15 |
| Acid in proteins | 16 |
| Acid in proteins, informally | 28 |
| Acid in tea | 11 |
| Acid in the '60s | 20 |
| Acid indicator | 14 |
| Acid indigestion | 16 |
| Acid indigestion cause, chemically | 34 |
| Acid initials | 13 |
| Acid jazz band with the 1996 hit "Virtual Insanity" | 61 |
| Acid linked to gout | 19 |
| Acid neutralizer | 16 |
| Acid neutralizers | 17 |
| Acid neutralizing base | 22 |
| Acid of dietary importance | 26 |
| Acid of soap | 12 |
| Acid one can ingest | 19 |
| Acid opposer | 12 |
| Acid or hard follower | 21 |
| Acid or high | 12 |
| Acid prefix | 11 |
| Acid prefixes | 13 |
| Acid Queen player in "Tommy" | 38 |
| Acid rain component | 19 |
| Acid reducer, briefly | 21 |
| Acid related to gout | 20 |
| Acid salt | 9 |
| Acid salts | 10 |
| Acid soil contents | 18 |
| Acid suffix | 11 |
| Acid test finding | 17 |
| Acid test material | 18 |
| Acid that helps you learn how to play "Free Bird"? | 60 |
| Acid that many dropped | 22 |
| Acid type | 9 |
| Acid type that can cause gout | 29 |
| Acid type used in the manufacturing of soap | 43 |
| Acid units | 10 |
| Acid used as a preservative | 27 |
| Acid used as an antiseptic | 26 |
| Acid used in antiseptics | 24 |
| Acid used in antiseptics: Comb. form | 36 |
| Acid used in fertilizers and explosives | 39 |
| Acid used in food preservatives | 31 |
| Acid used in insecticides | 25 |
| Acid used in making soap | 24 |
| Acid used in soap | 17 |
| Acid used in soap-making | 24 |
| Acid used in some trips | 23 |
| Acid used to make soap | 22 |
| Acid used to stain microscope slides | 36 |
| Acid user | 9 |
| Acid __ | 7 |
| Acid ___ | 8 |
| Acid's opposite | 19 |
| Acid's quality, in an acid test | 35 |
| Acid, at times | 14 |
| Acid, e.g. | 10 |
| Acid, in the 60's | 21 |
| Acid-alcohol compound | 21 |
| Acid-alcohol compounds | 22 |
| Acid-alcohol derivative | 23 |
| Acid-burned Bat-villain | 23 |
| Acid-forming | 12 |
| Acid-neutralizing base | 22 |
| Acid-neutralizing compound | 26 |
| Acid-test group? | 16 |
| Acid-test paper | 15 |
| Acid-testing paper | 18 |
| Acid-tongued | 12 |
| Acid-tongued "American Idol" judge | 44 |
| Acid/alcohol compound | 21 |
| Acid: Abbr. | 11 |
| Acid: Comb. form | 16 |
| Acidhead's drug | 19 |
| Acidhead's problem | 22 |
| Acidic | 6 |
| Acidic forest earth | 19 |
| Acidic prefix | 13 |
| Acidic solidifying point | 24 |
| Acidic, in Augsburg | 19 |
| Acidic, to a chemist | 20 |
| Acidic-tasting | 14 |
| Acidity | 7 |
| Acidity after gluttony | 22 |
| Acidity detector | 16 |
| Acidity factor | 14 |
| Acidity levels: Abbr. | 21 |
| Acidity measures | 16 |
| Acidity measures, informally | 28 |
| Acidity nos. | 12 |
| Acidity or alkalinity | 21 |
| Acidity or alkalinity measurement, which is literally 8 for this puzzle's four longest answers | 98 |
| Acidity tester | 14 |
| Acidity, in medicine | 20 |
| Acidity, to an M.D. | 19 |