How many letters does the top answer for “author of blue velvet” have?

The most common answer is hopper (6 letters).

Crossword clue: author of blue velvet

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

hopper 6 letters wd-fact-v3

funnel-shaped receptacle; contents pass by gravity into a receptacle below

lynch 5 letters wd-fact-v3

kill without legal sanction

author of blue 67% similar → mitchell

author of blue dragon 50% similar → toriyama

author of the blue bird 50% similar → daulnoy, maeterlinck

author of the blue castle 50% similar → montgomery

composer of blue velvet 50% similar → badalamenti, lynch

director of blue velvet 50% similar → hopper

wrote blue velvet 50% similar → hopper, lynch