Related Clues:

• W.W. II predator
• German sub
• See 7-Down
• Sub
• Part of a wolf pack
• W.W. II menace
• See 23-Across
• Submarine
• W.W. II vessel
• Destroyer destroyer
• Depth charge target
• 'Das Boot' setting
• German threat
• One trying to avoid charges?
• Sub that sank Allied ships