
1) Bowed instrument 2) Choral instrument 3) Instrument 4) Melodic instrument 5) Musical apparatus 6) Musical implement 7) Musical gizmo 8) Music machine 9) Musical device 10) Musical doodad 11) Musical gadget 12) Musical instrument 13) String instrument
Found on
https://www.crosswordclues.com/clue/arpeggione

It enjoyed a brief vogue, perhaps a decade, after its invention around 1823, by the Viennese guitar maker Johann Georg Stauffer (1778-1853). The only notable piece extant for the instrument is a sonata with piano accompaniment by Franz Schubert, D.821, not published until 1871, when the arpeggione was long defunct. This sonata is now commonly play...
Found on
http://en.wikipedia.org/wiki/Arpeggione

stringed instrument like the cello
Found on
http://phrontistery.info/a.html
No exact match found.