Related Clues:

• Huge mass of frozen lettuce!
• Frozen lump
• Titanic's nemesis
• One church composer offering a mass unpopular with sailors!
• Type of floe
• Beer and cig�s bad for unemotional type
• In command, diver hoisted marine hazard
• Titanic obstacle beginning to impede Anglican composer
• One old instrument sent back hint of German threat to shipping
• One church composer creating a floaty sort of mass
• One caught diving bird coming up for something to eat?
• One key diver sent back to find what's mostly underwater
• Seaborne territorial detachment from the Arctic
• I see water bird drifting north on floe
• One key diver recalled a danger at sea