Related Clues:

• You've only got to see 36 across for this.
• Only fishy, and that's flat!
• How 27 across follows 9 across, in short, and that's flat
• There's only this and that's flat
• It starts with Henry the First, although it's more than a little fishy
• It's largely flat, although it follows Henry the First
• is 27 across the only one to have one?
• 9 down in short, although that makes it largely fishy
• Henry I could have started it, although that's more than a little fishy
• Henry the First may have started it, although that's flat to a large extent
• Henry the First got 27 across back, and that's flat
• Perhaps Henry the First, although more than a little fishy
• Onl;y one, and that's flat
• Not the only thing to be found in the sea
• Henry the First, although that's flat