Related Clues:

• Glassmaking ingredient
• Beach washer
• See 39-Across
• Buggy terrain
• Smooth, as wood
• True grit
• Laundry detergent brand
• Kid's beach toy
• Desert sight
• Coastal feature
• Jack and Jill's vessel
• '...under the whelming ___': Milton
• Kind of trap
• Duffer's challenge
• Make smooth