How many letters does the top answer for “a wind that blows from the north” have?

The most common answer is norther (7 letters).

Crossword clue: a wind that blows from the north

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

norther 7 letters wn-def

a wind that blows from the north

northerly 9 letters wn-def

a wind that blows from the north

the north wind. shak. 50% similar → aquilon