The crossword solution for the term 'PLANT BY A POND' is REED, which is a four-letter word. A REED is a type of tall, slender grass that grows in wet areas such as marshes, ponds, and lakes. It is often used to make musical instruments, such as the clarinet, oboe, and saxophone. Reeds are also used to make paper, baskets, and other items. Planting reeds by a pond can help to improve the water quality and provide habitat for wildlife.