Possible Clues:

• Does it make Arran wet, distributed round island?
• It's so soft for the artist to be one of the 9 down
• Terrain was almost cracking — need for this?
• What falls on Heyerdahl's expedition in the sea?
• Downfall of prince with empty apartment for one that's evicted
• One of 8 (where 3 is 19) keeps Walter, a faller
• Drops of precipitation from clouds
• Result of downfall of old Prince, one yielding to rebel leader
• Where the artist may get wet if he's under a cloud (9)
• Marvin --, singer who had a 1958 No.1 UK single with 'Whole Lotta Woman'