Noise of rapid movement (5)
I believe the answer is:
whirr
(Other definitions for whirr that I've seen before include "Turn" , "Spin noisily" , "Humming sound" , "Sound of vibration" , "Spin with hum" .)
I believe the answer is:
whirr
(Other definitions for whirr that I've seen before include "Turn" , "Spin noisily" , "Humming sound" , "Sound of vibration" , "Spin with hum" .)