Possible Clues:

• Saucer cat licked for seafood
• Collection of hardbacks that could be scarce at university
• Classy setting in which to find lobster?
• Water fleas, barnacles, etc.
• A1 bread first served with a shellfish
• Crabby types curse a cat: it's out of order!
• Succeeded in accurate working in class
• Class of animals with hard shells
• King Charles, man beheaded by a crabby group?
• Some bread excellent with a class of seafood