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

The most common answer is rey (3 letters).

Crossword clue: composer of blue banisters

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

rey 3 letters wd-fact-v3

composer of blue 67% similar → mitchell

composer of blue velvet 50% similar → badalamenti, lynch

composer of rhapsody in blue 50% similar → gershwin

composer of the blue danube 50% similar → strauss