
1) Concert instrument 2) Concert Steinway 3) Fixture in Carnegie Hall 4) GP developed instrument 5) Keys for Elton 6) Necessity for Serkin 7) Nine-footer with 88 keys 8) Steinway instrument 9) Steinway product 10) Terrific musical instrument
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https://www.crosswordclues.com/clue/grand-piano

(from the article `keyboard instrument`) ...worked for the harpsichord builder Burkat Shudi when he first came to England, and around 1770 three other workmen in Shudi`s shop, John ... ...mass per unit length, and the higher strings made thinner and lighter. This means that the tension in all the strings can be made more nearly the ... ...
Found on
http://www.britannica.com/eb/a-z/g/58

A grand piano is a large piano, usually harp-shaped, in which the wires or strings are generally triplicated, increasing the power, and all the mechanism is introduced in the most effective manner, regardless of the size of the instrument.
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http://www.probertencyclopaedia.com/browse/VG.HTM

[
n] - a piano with the strings on a harp-shaped frame
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http://www.webdictionary.co.uk/definition.php?query=grand%20piano
grand noun a piano with the strings on a horizontal harp-shaped frame; usually supported by three legs
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https://www.encyclo.co.uk/local/20974
No exact match found.