Related Clues:

• Thing that might crawl on your neck
• What might develop into something substantial?
• 'Do you, my poppet, feel infirm? / You probably contain a ___': Ogden Nash
• Brazilian treehopper, for one
• Kid's "cootie"
• The ___ of an idea
• Software defect
• Infectious microbe
• Firefly, for example
• Country finally rejecting any possible reason for complaint
• Cricket or grasshopper
• Flawless person conceals primarily rough beginning
• Idea's starting point
• App issue