Related Clues:

• "I haven't a clue"
• "Haven't the foggiest"
• ''Good question!''
• ''Let me see . . .''
• 'Very interesting ...'
• "I have no idea"
• 'Heck if I know'
• ''No idea''
• Muser's sound
• 'No idea!'
• 'Let me think...'
• 'Let's see now ...'
• ''I've no idea''
• ''I dunno''
• ''Dunno''