Related Clues:

• 'No idea'
• "Beats me," slangily
• "I give up!"
• ''Got me!''
• ''I'm stumped!''
• 'Haven't the foggiest'
• "Search me!"
• [Shrug]
• Slangy "Beats me!"
• 'Can't answer that'
• Shrugger's comment
• "I'm stumped!"
• Pass fellow in unusual kit at the moment
• Uncertain view of an ignoramus?
• "Search me"