The term 'assume control' can be broken down into three crossword solutions: 'TAKEOVER' (8 letters), 'HELM' (4 letters), and 'takecharge' (10 letters). 'TAKEOVER' is a term used to describe the acquisition of a company or organization by another. 'HELM' is a nautical term referring to the steering wheel of a ship, and is often used metaphorically to refer to the person in charge of a situation. 'Takecharge' is an idiom meaning to take control of a situation. Together, these three terms can be used to describe the act of assuming control of a situation.