The crossword solution for the term 'Hearts, but not Spades' is 'ORGANS'. Organs are a type of musical instrument that produce sound by using air to vibrate pipes or reeds. They are often used in churches and other religious settings, as well as in concert halls and other venues. Organs come in many different sizes and styles, and can be played either manually or electronically. The most common type of organ is the pipe organ, which has been around since the Middle Ages.