The crossword solution for the term TART PART is CRUST, which is a five-letter word. A CRUST is a type of pastry that forms the outer layer of a tart or pie. It is usually made with flour, butter, and water, and can be either sweet or savory. The CRUST is then filled with a variety of ingredients, such as fruits, vegetables, meats, cheeses, and sauces. The CRUST helps to hold the filling together and gives the tart or pie its shape.