The term 'STEP IN A FLIGHT' can be solved by the crossword solution 'STAIR', which is a five-letter word. A STAIR is a set of steps leading from one floor of a building to another, typically inside the building. Stairs are commonly used to provide access between different levels of a structure, such as a multi-story building. Stairs can also be used for decorative purposes, such as in a grand staircase.