charge of, end, responsibility for an area of work / one who is in charge / (host industry) host / hostess who attends to a patron

(idiomatic) straight to the point; point-blank; frank; direct

frankness

person in charge, person responsible

an assistant (person who assists)

instant

something instant, such as instant coffee or some other processed food

doctor in charge / attending physician

(idiomatic) to take on a fight; lit. to buy a fight

buy on credit