Related Clues:

• What a detector may find
• Steel or silver
• Genre for 17-Across
• Microwave's foil?
• Sodium, for one
• Ozzy's genre
• Silver or platinum
• Iron or tin
• Zinc or zirconium
• Almost any element whose name ends in -ium
• Good conductor?
• Detector activator
• Like most golf woods, nowadays
• Heavy rock?
• Iron or copper, e.g.