The answer to the crossword question is “THE” and it is paired with “23-Down” to refer to a person’s soul mate. The word “THE” is a definite article that is used to indicate a specific noun or group of nouns. In this case, it is used to refer to the person who is considered to be someone’s soul mate. The term “soul mate” refers to a person with whom one has a deep and meaningful connection, often described as a spiritual or emotional bond. Therefore, the answer to the crossword question is “THE” and it is used in conjunction with “23-Down” to describe a person’s soul mate.