Related Clues:

• Gnat, often
• Horse unlikely to win a race
• Bug you want to swat
• Remind annoyingly
• Keep bothering
• Be a shrew
• Source of exasperation
• Annoy by persistent faultfinding
• Irritating sort
• Aphid, to a fruit tree
• Dennis the Menace, to Mr. Wilson
• Harpy
• Pester continuously
• Sick bay?
• Continuously bother