Possible Clues:

• Mass of small stones in burial place overlooking lake
• The Stones produced in the last place left
• Accommodates The Grateful Dead perhaps with leader leaving the rock group?
• Aquarium bed material
• Gold panner's discard
• Good composer in The Stones?
• Good composer in small rock group
• Coarse sand and stones
• Concrete ingredient
• Mass of small stones in burial place close to Balmoral