Possible Clues:

• Wash flapping on pegs
• Despite being holey it holds water
• Parasite
• Cake cut out? Rubbish! It's located in 16 11
• Spot remover
• Marine creature's hum pervading ocean? Not quite
• Soak and clean with damp cloth
• Light, absorbent skeleton of an aquatic mammal
• Aquatic creature,; cake
• Soapy antecedent of Pickwick and descendant of 17