The crossword solution for the term FITS NEATLY is NESTS. A nest is a structure built by certain animals, such as birds, to provide a safe place to lay eggs and raise their young. Nests are typically made from materials found in the environment, such as twigs, grass, and leaves, and are often lined with softer materials like feathers or fur. They are usually built in a sheltered spot, such as a tree or bush, and are designed to fit snugly around the eggs and young.