Possible Clues:

• Last of the spare wood
• Hard wood used for black piano keys and in cabinetwork
• Ivory's opposite
• Furniture's finish with thin dark wood
• '-- and Ivory', a Paul McCartney/Stevie Wonder hit (1982)
• "___ and Ivory" (McCartney/Wonder song)
• Heavy hard wood, usually black
• Furniture wood
• '-- and Ivory', a 1982 single by Paul McCartney and Stevie Wonder
• "--- and Ivory"