How many letters does the top answer for “composer of piano man” have?

The most common answer is joel (4 letters).

Crossword clue: composer of piano man

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

joel 4 letters wd-fact-v3

an Old Testament book telling Joel's prophecies

composer of first man 50% similar → hurwitz

composer of piano concerto 50% similar → ravel

composer of the elephant man 50% similar → lynch