Walking on eggshells is an expression used to describe a situation in which someone is very careful and cautious in order to avoid upsetting or offending someone else. It is often used to describe a relationship between two people that is TENSE and fragile. The term can also be used to describe a situation in which someone is trying to navigate a difficult situation with caution. The crossword solution for the term walking on eggshells is TENSE, which accurately describes the feeling of being in such a situation.