One Year in a Trunk' is a phrase that refers to a period of time spent in isolation or seclusion. The term is derived from the story of a man who, after being wrongfully accused of a crime, spent one year in a trunk in order to avoid capture. The crossword solution for this phrase is RING, which could refer to the RING of keys used to lock the trunk, or the RING of people who were involved in the man's wrongful accusation.