Related Clues:

• A lone fish?
• The fish is alone
• Exclusive, only
• Kind of fish - lose it
• A lone sort of fish - lose it
• A lonely sort of flatfish
• You've only got to see 36 across for this.
• Only fishy, and that's flat!
• How the South got possession of this was fishy
• There's only this and that's flat
• is 27 across the only one to have one?
• Onl;y one, and that's flat
• Not the only thing to be found in the sea
• That's the only thing that's underfoot, and that's flat
• The fish might make a dash for it