Related Clues:

• 'No clue!'
• "Search me"
• "Haven't the foggiest"
• 'Your guess is as good as mine'
• ''That's tough!''
• 'Heck if I know'
• ''I'm at a loss''
• 'No idea!'
• Pronounced as 'venson'? I haven't a clue!
• Shrugger's remark
• '???'
• 'I have no clue'
• "I'm clueless"
• Shrugging admission
• 'Got me'