Related Clues:

• Metallic element
• Element discovered in 1778
• Element's mass men doubly misrepresented
• Its atomic number is 95-Across
• Comfortably Numb melody is pure metal!
• Very hard silvery-white metal
• Hit dumbly on me and Mo
• Element #42 (which for some reason isn't in as many puzzles as, say, 19-Across)