Related Clues:

• Base's counterpart
• Digestive fluid
• Folic ___
• Inspiration for Hunter S. Thompson
• See 89-Across
• Timothy Leary dropped it
• Breakdown cause
• Citric __
• Sharp, like wit
• "Maalox moment" cause
• A kind of test
• Base's opposite
• Amino or hydrochloric
• Word before rain or rock
• Amino, boric or citric