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

The most common answer is liszt (5 letters).

Crossword clue: composer of hamlet

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

liszt 5 letters wd-fact-v3

Hungarian composer and piano virtuoso (1811-1886)

thomas 6 letters wd-fact-v3

the Apostle who would not believe the resurrection of Jesus until he saw Jesus with his own eyes

composer of q18345138 50% similar → mccreary

composer of q19413951 50% similar → nimri

composer of q20856802 50% similar → gosling, hurwitz

composer of q49740 50% similar → raine

composer of q58045522 50% similar → fox