The crossword solution for the term 'Holiday Lead-In' is 'EVE', which is a three letter word. EVE is a biblical figure from the Old Testament, who is traditionally regarded as the first woman created by God. She is also known as the mother of all living, and is often associated with the beginning of a new era or cycle. In the Christian tradition, she is seen as a symbol of hope and renewal, and is often used to mark the start of the holiday season.