How many letters does the top answer for “composer of sleepy hollow” have?

The most common answer is reed (4 letters).

Crossword clue: composer of sleepy hollow

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

reed 4 letters wd-fact-v3

a musical instrument that sounds by means of a vibrating reed

author of sleepy hollow 50% similar → walken

director of sleepy hollow 50% similar → reed, walken

wrote sleepy hollow 50% similar → walken