The term 'PART OF A SANDAL' can be summarized by two crossword solutions: THONG (5 letters) and STRAP (5 letters). A THONG is a type of sandal that has a STRAP that passes between the toes and is secured around the ankle or lower leg. A STRAP is a piece of material, such as leather or fabric, that is used to fasten a sandal to the foot. Straps are typically found on sandals with multiple straps that wrap around the foot and ankle.