The term ONE WIELDING AN AX can be solved by the crossword solution FIRER, which is a five letter word. A firer is someone who is responsible for lighting and maintaining a fire, such as a campfire or a furnace. They are also responsible for controlling the intensity of the fire, and ensuring that it does not spread beyond its intended area. In this case, the firer is wielding AN AX, which could be used to chop wood for the fire, or to help control the fire's spread.