Possible Clues:

• Liver inflammation
• Virus with A, B and C strains
• It's Patrick himself, so it is, that's the evil liver (9)
• A, B or C preceder
• It's himself, Patrick, so it is, that's the evil-liver
• It's Patrick himself, so it is, that's the evil liver
• It's livery for himself, Patrick, so it is
• 'Tis himself, Patrick, so 'tis that's the evil liver
• Patrick himself so it is that's such an evil liver
• Disease affecting liver