Possible Clues:

• Fish in tin?
• Certain rush hour commuter, metaphorically
• Little fish in a tin
• A diner's chewed fish
• Emperor with no time to eat fish
• Artist's back to eat fish
• Rational about investigator's conclusion, detective reveals something fishy
• Stone fish
• Feast on heads of sea and river fish
• Artists come back to have supper of fish out of can