Related Clues:

• Gold or lead
• A first principle, found in a kettle?
• Aluminium or copper for instance
• Constituent part
• Silver or gold, say
• Copper or silver, say
• Constituent part (7)
• Copper or gold, say
• Constituent component
• Came across with a pound coin?
• Chemically and currently it may be glowing
• One might find one in the bulb in the laboratory
• Chemically, one may get heated
• Came across a pound coin?
• The chemist might get a glow from it