The term 'juice source' can refer to a variety of different things. An APPLE, with five letters, is a common fruit that can be juiced. A BATTERY, with seven letters, is an electrical device that can be used to power a device that can extract juice from fruits or vegetables. PAPAYA, with six letters, is another fruit that can be juiced. An OUTLET, with six letters, is an electrical connection that can be used to power a juicer. ORANGE, with six letters, is a citrus fruit that can be juiced. A SOCKET, with six letters, is an electrical connection that can be used to power a juicer. Finally, a drycell, with seven letters, is a type of BATTERY that can be used to power a juicer.