The term 'GREEN PIECE' can be broken down into five crossword solutions: BILL (4 letters), ECO (3 letters), LEAF (4 letters), SOD (3 letters), and PUTTER (6 letters). BILL is a common term for a monetary instrument, such as a paper note or coin. ECO is an abbreviation for ecology, which is the study of the relationship between living organisms and their environment. LEAF is a part of a plant that is typically flat and thin, and is used for photosynthesis. SOD is a type of grass that is grown from small pieces of turf, and is often used to cover lawns. PUTTER is a type of golf club that is used for short, low-trajectory shots. Together, these five terms represent a variety of green elements, from money to plants to grass.