Stringed Musical Instrument of the Middle Ages
Puzzle 9 of National Crossword Day Hard Pack
Question is: Stringed Musical Instrument of the Middle Ages
and the answer is: PSALTERY
Word Meaning:
PSALTERY — (music) A zither-like musical instrument consisting of a soundboard with multiple strings, played by plucking the strings with the fingers or a plectrum.
Definitions from Wiktionary.