The term 'barbecue stick' can be broken down into two crossword solutions: SPIT (4 letters) and SKEWER (6 letters). A SPIT is a long metal rod that is used to hold food over an open fire, while a SKEWER is a thin metal or wooden stick that is used to hold food together while it is being cooked. Both of these tools are commonly used in barbecuing, and they are essential for ensuring that food is cooked evenly and safely.