The crossword solution for the term 'Flute Feature' is STEM, which stands for the part of the flute that is held by the player. The STEM is the part of the flute that connects the head joint to the body of the instrument. It is usually made of metal or wood and is used to hold the flute in place while playing. The STEM also helps to control the sound of the flute by allowing the player to adjust the angle of the head joint.