Possible Clues:

• The sticker is not stiff to start with
• Allow little devil to enter - he's not easily got rid of
• Shellfish; type of mine
• Cousin of a conch
• After half a century I am sticky little dear
• That takes the stick to everything
• Adhesive mollusc
• Allow entertaining rogue to serve up shellfish
• By the sound of it, hobble to it and stick to it
• Proverbially clingy mollusc