Related Clues:

• Enemy holds sovereign in frozen waste
• Ice formation
• Penguin's spot, maybe
• Piece of ice
• Arctic obstacle
• Polar sheet
• Arctic Ocean danger
• Ross Sea floater
• Penguin perch, perhaps
• Part separated from a mass of ice
• Polar bear's resting spot
• Place for a polar bear
• Cold drifter
• Frozen sea peril
• Moving ice