Related Clues:

• 'No idea!'
• Words accompanying a shrug
• 'Can't say'
• Shrugger's remark
• Unhelpful reply
• 'Don't ask me!'
• 'I have no clue'
• 'You got me'
• 'Got no clue!'
• Shrugging admission
• 'Got me'
• 'Who knows?'
• "Couldn't tell ya"
• "I have no clue"
• 'Uh, no idea'