Related Clues:

• 'Beats me!'
• 'Don't ask me'
• 'Beats me'
• 'Search me'
• Not the faintest idea
• "Beats me!"
• How to interpret 20-, 38-, and 56-Across
• What the befuddled have
• 'I haven't the foggiest!'
• 'Haven't the foggiest'
• 'I'm stumped'
• "Haven't the foggiest"
• What the puzzled have
• "Dunno"
• “Ask someone else”