Related Clues:

• See 43 Across
• Part of RNA
• Sulphuric or nitric
• Boric, e.g.
• Low-pH substance
• Acrimonious
• Sour-tasting substance
• Like vinaigrette
• Carbolic and sulphuric ender
• Base neutralizer
• Scathing
• Small fruit pie
• Like burning rubber
• Having a kick
• Target of milk of magnesia