The crossword solution for the term 'Cause Strain To' is 'Overtax'. Overtaxing is a situation in which someone or something is asked to do more than they are capable of doing, often resulting in stress and strain. This can be seen in many different contexts, such as when an employee is asked to take on too much work or when a country is asked to pay too much in taxes. In either case, the result is often an inability to meet the demands placed upon them, leading to strain and stress.