The term 'tightrope' is a metaphor for a precarious situation, and can be broken down into two words: 'TIGHT' and 'ROPE'. The crossword solution for the first word is 'WIRE', which is a thin strand of metal that is often used to construct a ROPE. This WIRE is usually strong enough to support a person's weight, allowing them to walk across it. Tightropes are often used in circus performances, where performers must balance on the WIRE while performing stunts. Tightropes can also be used as a metaphor for a difficult situation, such as a difficult decision or a difficult conversation.