How many letters does the top answer for “composer of project hail mary” have?

The most common answer is gosling (7 letters).

Crossword clue: composer of project hail mary

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

gosling 7 letters wd-fact-v3

young goose

author of project hail mary 60% similar → weir

director of project hail mary 60% similar → gosling

wrote project hail mary 60% similar → weir