Related Clues:

• Sour (substance)
• Sarcastic (could be sulphuric?)
• Sour — vitriolic
• Sour — sharp
• Amino or citric
• Kind of wit in current papers
• Something helpful containing cold, so-called drug
• It's passed at many a rap show
• Lawn liming target
• What an MC grips
• The "A" in DNA
• Battery or folic
• Corrosive battery chemical
• Tape recorder jack label
• LSD, informally