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