Related Clues:

• Single-celled animal
• Are diamonds out of fashion with bachelor leading a simple life?
• Protozoan identified in a second set of notes
• A second president overthrown by insignificant creature
• A second insect almost knocked over a tiny organism
• Single-cell creature
• Farm loves baas to be regularly put out by little creature
• Tiny animal president returned to a doctor
• Tiny life form
• A crowd catches spectre finally, a shape-shifter
• A micro-organism of extremely basic anatomy, primarily
• A doctor's article about Old English protozoan
• Declaration of graduate describing old European protozoan
• One-celled swimmer
• Microscopic creature (var.)