How many letters does the top answer for “wind that blows from west to east” have?

The most common answer is wester (6 letters).

Crossword clue: wind that blows from west to east

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

wester 6 letters wn-def

wind that blows from west to east

author of east wind: west wind 60% similar → buck

wrote east wind: west wind 60% similar → buck

a wind from the east 50% similar → easterly