clean as a whistle

:  free from dirt or pollution

:  free from contamination or disease

:  free or relatively free from radioactivity

:  so as to clean

:  in a clean manner

:  all the way :  completely

:  to make clean: such as

:  to rid of dirt, impurities, or extraneous matter

:  to rid of corruption

:  an act of cleaning dirt especially from the surface of something

:  a small wind instrument in which sound is produced by the forcible passage of breath through a slit in a short tube

:  a device through which air or steam is forced into a cavity or against a thin edge to produce a loud sound

:  a shrill clear sound produced by forcing breath out or air in through the puckered lips

:  to utter a shrill clear sound by blowing or drawing air through the puckered lips

:  to utter a shrill note or call resembling a whistle

:  to make a shrill clear sound especially by rapid movement