Related Clues:

• Frost a cake
• Freezer buildup
• Wintry buildup
• Apply frosting to
• Seal, as a deal
• Hotel bucketful
• Floe material
• Jewels, slangily
• Sculpting material
• Plans may be put on it
• 6-Down's surface
• The ends of 20-, 39- and 56-Across are forms of it
• Party host's bagful
• Rocks in a tumbler
• To put in a drink or slide on