Related Clues:

• Nose
• Be stealthy
• Snitcher
• One who peeps, perhaps
• Furtive type
• Tiptoe
• Underhanded sort
• Furtive one
• Pesky neighbor
• Poke (around)
• Prying sort
• Type of preview
• Tell on
• One not to be trusted
• Be too inquisitive