How many letters does the top answer for “a man's hat with a tall crown; usually covered with silk or with beaver fur” have?

The most common answer is stovepipe (9 letters).

Crossword clue: a man's hat with a tall crown; usually covered with silk or with beaver fur

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

stovepipe 9 letters wn-def

a man's hat with a tall crown; usually covered with silk or with beaver fur

topper 6 letters wn-def

a man's hat with a tall crown; usually covered with silk or with beaver fur