Related Clues:

• It's caustic
• A CID could not be so base
• After half a century you get quite caustic
• It's base, but never a CID matter
• Highly caustic stuff
• Drain-clearing chemical
• Drain-cleaner chemical
• Burning stuff
• Drain-cleaner ingredient
• Cleaning substance
• Albert with Shiva's wife ... basic stuff!
• Hominy-making solution
• Common name for sodium hydroxide
• Chemical that's partly chalk - a little soft
• One left with the destroyer makes for blue paper