Related Clues:

• Hard question
• First sign of true intelligence in a fool
• Target for an exterminator
• Source of vexation
• Tricky question, part of quite a series
• Telemarketer, to many
• Unwelcome garden visitor
• Tease genially
• One-minute excerpt, maybe
• Inane one
• Brain game
• Nuisance of bank's personal interest
• Try endlessly to have comfort in puzzle
• Silly person, ultimately without intelligence
• Garden interloper