Related Clues:

• Hold dearly, like buried gold etc
• A quantity of valuable objects
• Not safe to finish across, perhaps
• Tear in bits what is certainly valuable
• Tear a certain valuable find with 16 across
• It takes precious much to book this along with the island
• Novel sort of an island - that's rich!
• Novel sort of island worth a lot
• Precious island of a novel type
• About a certain novel island at last
• Pirate's chestful
• It might be buried or, as you are told, in a tree
• An adjustable rate that's certain to hold, dear
• Thinking first about a certain prize
• See 10