Possible Clues:

• Greenland has one
• Would electric blanket melt it?
• Arctic covering
• It contains cheese spread to make a slippery surface
• The majority of Antarctica
• Chap set about pursuing diamonds in frozen waste
• Extensive frozen layer
• You could slip over to first person getting in touch with Clare for bed linen
• Don't expect polar bear to use this in bed to keep warm from frost layer
• Floater on a frigid sea (2 words)