Possible Clues:

• Crow
• It's a shame having to eat it
• Not a good thing to have to eat
• Being unlikely to boast, detective found last clue, those feeling the shame consumed it
• Figurative serving of humiliation
• "Natural Born Boogie" group
• Eat this dish to be apologetic
• It's eaten in abject apology
• Limb initially Uriah Heep cooked for his food
• Comeuppance, figuratively