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

The most common answer is hopper (6 letters).

Crossword clue: director of blue velvet

1 answer 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

author of blue velvet 50% similar → hopper, lynch

composer of blue velvet 50% similar → badalamenti, lynch

director of blue dragon 50% similar → toriyama

director of miami blues 50% similar → leigh

wrote blue velvet 50% similar → hopper, lynch