Related Clues:

• Lumber flaw
• Gordius' problem
• Configuration
• Rope expert's favorite radio station?
• Tough problem
• It's a tie
• It takes two people to tie it
• Sailor's creation
• Tangled mass
• Half hitch or granny
• Prepare a necktie
• Granny or square follower
• Gordius' poser
• Group of toads, e.g.
• Multisided shape