Related Clues:

• ''I'm at a loss''
• Pronounced as 'venson'? I haven't a clue!
• Words accompanying a shrug
• 'Can't say'
• Unhelpful reply
• 'Don't ask me!'
• '???'
• 'You got me'
• "I'm clueless"
• 'Got no clue!'
• "Couldn't tell ya"
• 'Uh, no idea'
• "Darned if I know"
• 'Darned if I know'
• Comment accompanying a shrug