Donuts are a popular pastry that are often characterized by their round shape and hole in the center. The term 'donut features' refers to the characteristics of a donut, such as its shape, size, texture, and flavor. The crossword solution for 'donut features' is 'holes, ' which refers to the hole in the center of a donut. This hole is an essential feature of a donut, as it is what makes it distinct from other pastries.