Possible Clues:

• Requiring a microscope to see
• Very small container attached to back of lorry
• Minute part of it in yolk
• Small-scale revolt ousting character in Athens
• Very little in supermarket in York
• Ironic nickname for a bouncer
• Piece of eight in your pocket
• Some bloodlust in Yorkshire is negligible
• Microscopic, maybe
• Little bit in your houses