1) Ancestor of the harmonica 2) Early folk flute 3) Harmonica ancestor 4) Pandean pipe 5) Pastoral wind 6) Primitive mouth organ 7) Syrinx 8) Wind 9) Wind instrument Found on https://www.crosswordclues.com/clue/panpipe
wind instrument consisting of cane pipes of different lengths tied in a row or in a bundle held together by wax or cord (metal, clay, wood, and ... [7 related articles] Found on http://www.britannica.com/eb/a-z/p/13