The crossword solution for the term 'You Were Here!' is 'WISH', which is a four-letter word. Wishing is an expression of hope or desire for something to happen. It is often used as a way to express good luck, or to express a longing for something that is out of reach. Wishing can also be used to express regret or sadness for something that has already happened. In this case, the phrase 'You Were Here!' could be interpreted as a WISH for someone to have been present in a certain place or situation.