Related Clues:

• Bug you want to swat
• Source of exasperation
• Minion of Mephistopheles
• Succubus
• Irritating sort
• Aphid, to a fruit tree
• Dennis the Menace, to Mr. Wilson
• Wake Forest ___ Deacons
• Mosquito or mole, e.g.
• Fly, perhaps
• 17-Across in the neck
• Familiar, perhaps
• Annoying bug
• Irksome one
• Pain in the ass