Related Clues:

• Steel, e.g
• Good conductor for one sort of music
• Black Sabbath's music, for short
• 51-Across, e.g
• Music genre that's sometimes 'heavy'
• For example, lead guest finally into dinner, say
• Any of the rare-earth metals
• The answer to each clue that says 'This, on the periodic table'
• Lead, perhaps, in which you show your best
• Musically it can be heavy
• Part water, perhaps?
• Wire in electric fire
• Genre for Black Sabbath
• The Last Shadow Puppets "The ___ of Surprise"
• Something used for heating fire, say