Instrument with 47 strings and seven pedals (4)

I believe the answer is:

harp

(Other definitions for harp that I've seen before include "Instrument for angel" , "Traditional Gaelic musical instrument" , "Talk tiresomely using upright musical instrument" , "Stringed instrument" , "semitone higher, abandoning intro" .)

I've seen this clue in The New York Times.

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