Related Clues:

• See 4-Down
• Sturdy one
• Acorn, eventually
• Floor unit
• Mosaic piece
• Bathroom flooring
• Shade provider
• Mah-jongg piece
• Domino, e.g.
• Ilex, for one
• Scrabble piece
• It's baked in a square
• Scrabble draw
• Hard wood
• 4-point W, e.g.