Related Clues:

• Perhaps the sort of sand that will get firm
• There's mountains of them in the kitchen
• Perhaps the sand is like concrete
• Might sand perhaps behave like cement?
• Might the sand, perhaps, get as hard as cement?
• Mountains for the artillery
• 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
• Fire on the mountains
• Fire on it or in it