Related Clues:

• 'I have no idea!'
• Expression of bafflement
• -
• "How should I know?"
• Perplexed pronouncement
• 'I have no idea'
• 'Dunno'
• "Who knows?"
• [   ]
• 'No clue'
• Comment made with a shrug
• Appropriate comment for this puzzle
• 'I haven't the foggiest'
• 'No idea'
• 'I haven't a clue'