Possible Clues:

• Animal entrails and internal organs - worthless
• Refuse to give old fellows a pound
• Irish county endlessly produces refuse
• Liver, kidneys etc - rubbish
• Meats no longer fresh, all reduced by a pound
• Liver possibly past its sell-by date, a pound
• It's just not on to get a pound of such rubbish
• Organs as food
• Edible insides
• Edible liver or heart of animal