Related Clues:

• 'No clue!'
• "I haven't a clue"
• "Haven't the foggiest"
• 'Your guess is as good as mine'
• ''That's tough!''
• ''Good question!''
• "I have no idea"
• 'Heck if I know'
• ''No idea''
• 'No idea!'
• ''I've no idea''
• ''I dunno''
• ''Dunno''
• Shrugger's remark
• Request for job from university scholar I don't know!