Related Clues

• Sphinx
• Elgar's "___ Variations"
• Puzzle
• Poser
• Mystery
• Complete baffler
• Something inexplicable
• Stumper
• Perplexer
• It's mind-boggling
• Riddle
• Mind-boggler
• "Hmm?" inducer
• It's not clear
• It's hard to understand
• Conundrum
• Head-scratcher
• Knot
• It's puzzling
• Something of a mystery