Pipe organ stop (8)
I believe the answer is:
diapason
(Other definitions for diapason that I've seen before include "Othello's enemy" , "Organ stop; sad piano (anag.)" , "Entire range of musical instrument or voice" , "tuning fork" .)
I believe the answer is:
diapason
(Other definitions for diapason that I've seen before include "Othello's enemy" , "Organ stop; sad piano (anag.)" , "Entire range of musical instrument or voice" , "tuning fork" .)