The term 'scarecrow fill' is a crossword solution for the word 'STRAW'. A scarecrow is a figure made of STRAW and other materials, such as old clothes, that is used to scare away birds and other animals from crops. It is often placed in fields to protect the crops from being eaten by birds and other animals. The STRAW used to make the scarecrow is usually stuffed into the clothing to give it shape and form.