Related Clues:

• 'I haven't the foggiest'
• "Beats me!"
• 'Ya got me'
• 'No idea'
• 'I haven't a clue'
• 'Who knows?!'
• ''Search me''
• "Beats me," slangily
• "I give up!"
• "Haven't a clue!"
• What the clueless have
• 'Hell if I know'
• What the clueless have?
• ''Got me!''
• ''I'm stumped!''