Related Clues:

• It's a simple thing to multiply by dividing
• A doctor with English degree, low life
• It finds it difficult to keep in shape
• In Rome I love to be back with a simple form of life
• A second little boy coming back as a shape-shifter
• In a trice English graduate gets a bug
• Protozoan of ever-changing shape
• Microscopic, single-cell creature
• Unicellular form
• Fish - fingerprint
• Fingerprint - fish
• Microscopic life form
• Small North Atlantic flatfish
• Single-celled form of life of ever-changing shape
• Brylcreem amount?