The term 'barbecue gadget' can be summarized by the crossword solution 'SPIT, ' which is a four-letter word. A SPIT is a device used for roasting meat, usually over an open fire. It consists of a long metal rod that is placed horizontally over the fire and the meat is skewered onto the rod. The rod is then rotated slowly so that the meat is cooked evenly. Spits have been used for centuries to cook food over an open flame and are still popular today.