Related Clues:

• "Not a clue!"
• 'I dunno'
• "No clue"
• 'No clue!'
• "Search me"
• "Haven't the foggiest"
• 'Your guess is as good as mine'
• ''That's tough!''
• "I have no idea"
• ''No idea''
• ''I'm at a loss''
• 'No idea!'
• "Ain't got a clue!"
• Shrugger's remark
• Verbal equivalent of a shrug