Related Clues:

• A leading entertainer in The Wild Bunch is a parasite
• Creature viewed in biology class
• Unicellular swimmer
• Animal in a cell — a second has been regularly raised
• Simple swimmer
• A second English degree? That’s not much of a life
• Brainless life-form a second President recalled?
• Little one on a slide
• Brainless creature Obama replaced absorbs energy
• Having smuggled in drugs, a Mafia leader on Alcatraz moving cell
• One has one cell
• Blob under a biology class microscope
• One-cell creature
• A top entertainer in The Mafia is a parasite
• A graduate securing second degree ultimately is simple creature