Related Clues:

• Tangled
• No picnic
• Hard to figure out
• Not quickly solved
• Stubborn, as a problem
• Tangled up
• Knotty
• Copy type
• Word with labor or candy
• Nearly unsolvable
• Word with boil or line
• "A ___ Day's Night"
• Difficult to solve
• Cryptic
• Perplexing