Related Clues:

• 'Couldn't tell ya!'
• ''I'm flummoxed''
• ''No clue''
• "I haven't the foggiest"
• Something said with a shrug
• ''Couldn't say''
• Empty-headed remark?
• 'I'm drawing a blank'
• "I'm drawing a blank"
• 'Haven't the foggiest!'
• 'Wish I knew'
• "Wish I knew"
• “I’m drawing a blank”
• “Beats me!”
• 'Unsure about that'