Related Clues:

• With 42-Across, time of cavemen
• Y-shaped launcher
• See 5
• See 3
• See 1
• See 19
• See 21
• See 7
• See 23
• Catapult fish into vessel on boiling
• 9 square pitch
• Piece of rock - weight
• No slights (anag) — catapult (US)
• Hard lump of mineral matter
• Calculus, e.g