Answer:

winnow

Answer	Crossword Clue
WINNOW	Sift
WINNOW	Separate grain from chaff
WINNOW	Separate grain and chaff

WINNOW	Free grain from chaff
WINNOW	Cull
WINNOW	Blow off chaff.
WINNOW	Blow away.
WINNOW	Fan.
WINNOW	Separate the chaff.
WINNOW	Sift.
WINNOW	Separate chaff from grain

WINNOW	Reduce to only the best
WINNOW	Narrow down

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.