Related Clues:

• Word said with a shrug
• Pass notes for couple to hold
• Am clueless, informally
• "Darned if I know"
• 'Darned if I know'
• Pair guarding terminals in Newhaven search me
• It may be said with a shrug
• Comment expressed online as ¯\_(''/)_/¯
• 'Couldn't tell ya!'
• ''I'm flummoxed''
• Sorry, I can't help you up on horse first
• "I haven't the foggiest"
• Empty-headed remark?
• No idea (informal)
• Pair taking in two points haven't a clue