The term 'Flute Range' refers to the range of notes that can be played on a flute. The crossword solution for this term is 'ALTO, ' which is a four-letter word. ALTO is a musical term used to describe the second-lowest vocal range in choral music, and it is also used to refer to the second-highest instrument in a family of instruments, such as the flute. Therefore, the term 'Flute Range' can be summarized as referring to the range of notes that can be played on a flute, with the lowest note being an ALTO.