How many letters does the top answer for “a high-crowned black cap worn by men in turkey and iran and the caucasus” have?

The most common answer is calpac (6 letters).

Crossword clue: a high-crowned black cap worn by men in turkey and iran and the caucasus

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

calpac 6 letters wn-def

a high-crowned black cap worn by men in Turkey and Iran and the Caucasus

calpack 7 letters wn-def

a high-crowned black cap worn by men in Turkey and Iran and the Caucasus