The term 'BIRD's crop' refers to a part of the digestive system of a BIRD. The crop is a pouch-like organ located at the base of the neck, just above the sternum. It stores food and helps to moisten it before it passes into the stomach. The two crossword solutions for this term are CRAW (4 letters) and MAW (3 letters). CRAW is an old English word meaning throat or gullet, which is an appropriate description of the BIRD's crop. MAW is an old English word meaning stomach, which is also an appropriate description of the BIRD's crop.