The term 'Sign of Vacancy' is often used to refer to a vacancy sign, which is a sign that is placed in a window or on the door of a business or other establishment to indicate that there is an open position available. The crossword solution for this term is 'STARE', which is a verb meaning to look fixedly and intently at something. This term is often used to describe the way someone looks when they are searching for a job or trying to find an open position.