The crossword solution for the term UNDERWAY, TO SHERLOCK HOLMES is AFOOT. This phrase is a reference to the famous detective Sherlock Holmes, who was created by author Sir Arthur Conan Doyle. In the stories, Holmes often used the phrase 'the game is AFOOT' to indicate that he was beginning an investigation. Therefore, the term UNDERWAY, TO SHERLOCK HOLMES can be interpreted as meaning that something has begun.