Related Clues:

• Barista's concoction
• Heavy metal mix, perhaps
• Many a filling material
• Bronze or brass, perhaps
• Steel, for one
• Metal fusion
• Coffee, often
• Solder, for one
• Thorough mixture
• Bachelor given loan by union
• Intermix
• Devalue colleague about nothing
• Mix, combine
• Eg, pewter or brass
• Mix up book — what library does