Possible Clues:

• Activity of crook detective tails in a restaurant
• Is backtracking over cold, current measure producing something fishy
• Seafood terror on island
• Trick needed with very good sea food
• Is backtracking over David, for one, producing something fishy
• Monkey one for seafood treat
• Rascal’s given one seafood
• Norway lobsters — Dublin Bay prawns
• See 38 Across
• Trick by Greek character providing sea food