clear-swept

clear-swept (not comparable)

1. Perfectly clear; free of any extraneous matter.
   • 1895, Kenneth Graham, The Golden Age, London, page 8:

     Poplars swayed and tossed with a roaring swish; dead leaves sprang aloft, and whirled into space; and all the clear-swept heaven seemed to thrill with sound like a great harp.

• screwplate