The term 'Silent One' can be described by three crossword solutions: CLAM (4 letters), Cal (3 letters), and Harpo (5 letters). CLAM is a type of mollusk that lives in the ocean and is known for its ability to close its shell tightly. Cal is a shortened form of the name Calvin, which is derived from the Latin word for 'BALD'. Harpo is a reference to the silent film star Harpo Marx, who was famous for his comedic performances without speaking.