Related Clues:

• Copper or nickel
• No-no in a microwave
• Heavy genre
• Copper, for one
• Tin or titanium
• Word with heavy or sheet
• Evening star, e.g.
• Earth, for one
• Ore material
• "___, won't you?" (query from old commercials for The Jetsons)
• Tin or tungsten
• Pluto, until recently
• Tin, for one
• Lonely ___
• World