Related Clues:

• Base's counterpart
• Digestive fluid
• Pucker-inducing element of some wines
• Folic ___
• Inspiration for Hunter S. Thompson
• See 89-Across
• Timothy Leary dropped it
• Breakdown cause
• Citric __
• Sharp, like wit
• "Maalox moment" cause
• Boldness to a fault
• It may be unmitigated
• Unmitigated stuff
• A kind of test