The answer to the crossword for the term 'WATSON PORTRAYER ON 'ELEMENTARY'' is LIU, which stands for Lucy Liu. Lucy Liu is an American actress, voice actress, director, and artist who is best known for her roles in films such as Charlie's Angels, Kill Bill, and Elementary. She has also had a successful career in television, appearing in shows such as Ally McBeal and Elementary, where she portrays the character of Joan Watson.