The term 'Cause of Some Shaking' can be summarized by three crossword solutions: AGUE (4 letters), DEAL (4 letters), and DTS (3 letters). AGUE is an old-fashioned term for a fever or an illness characterized by fever, chills, and sweating. DEAL is an agreement or arrangement between two or more parties, especially in business or politics. DTS stands for Delirium Tremens, which is a severe form of alcohol withdrawal that causes shaking, confusion, and hallucinations.