Related Clues:

• Film monster of 1958 and 1988
• 'Ghost-busters' gunk
• Yucky muck
• Sticky mud
• Embryonic shape, at first
• Moo __ gai pan
• Crude oil, e.g.
• Sludgy stuff
• Gooey mass
• Mucky stuff
• 'Ick!' evoker
• Exudation, maybe
• 1950s sci-fi villain
• Out-of-focus image, say
• Scuzz