Dull, monotonous sound (5)
I believe the answer is:
thrum
(Other definitions for thrum that I've seen before include "Play monotonously" , "Tap a beat with fingers" , "something fibrous" , "Perform monotonously" , "go on and on" .)
I believe the answer is:
thrum
(Other definitions for thrum that I've seen before include "Play monotonously" , "Tap a beat with fingers" , "something fibrous" , "Perform monotonously" , "go on and on" .)