The crossword solution for the term 'SOUNDS IN 'OLD MACDONALD HAD A FARM'' is BAAS, which stands for BAA, MOO, oink, and QUACK. These are the sounds made by the animals in the popular children's song 'Old MacDonald Had a Farm'. The song is about a farmer named MacDonald who has a variety of animals on his farm, including a cow, a pig, and a duck. Each animal makes its own unique sound, which is represented by the letters BAA, MOO, OINK, and QUACK.