Related Clues:

• Might the sand, perhaps, get as hard as cement?
• Collection of sand, perhaps
• Has the sand, perhaps, hardened like concrete?
• Sand, perhaps, on the court
• Is it sand that has its place here?
• Might the sand have got as hard as cement?
• Perhaps sand will do this with cement
• That's placed at the end of 25 across
• Place the collection here
• Might be sand that has got hard as cement
• Sand perhaps got as hard as cement
• Might sand get as hard as concrete?
• The collection of sand?
• Perhaps it's sand at the bottom of 23 across
• Perhaps sand has got hard