Related Clues:

• Inner surface
• Large passenger ship travelling on regular route
• Removable inner skin or large passenger ship
• Large passenger ship
• Perhaps ELR was all at sea
• It's all inside - twice in inside
• In in, in what's in
• It's all inside with the inside in at the double
• It's all inside and twice in inside
• Twice in the inside
• It's in the inside - twice in the inside
• The one that ruled the waves?
• Twice in in the inside of what's inside
• In, in twice, never out
• Twice in, in what is in