Oom-pah instrument (4)
I believe the answer is:
tuba
(Other definitions for tuba that I've seen before include "Brass "oompah" instrument" , "Deep brass instrument" , "Musical instrument -- 5 (rev)" , "Stop" , "It's not top brass" .)
I believe the answer is:
tuba
(Other definitions for tuba that I've seen before include "Brass "oompah" instrument" , "Deep brass instrument" , "Musical instrument -- 5 (rev)" , "Stop" , "It's not top brass" .)