How many letters does the top answer for “wrote gravity's rainbow” have?

The most common answer is pynchon (7 letters).

Crossword clue: wrote gravity's rainbow

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

pynchon 7 letters wd-fact-v3

United States writer of pessimistic novels about life in a technologically advanced society (born in 1937)

wrote the rainbow 67% similar → lawrence

author of gravity's rainbow 50% similar → pynchon

wrote rainbow valley 50% similar → montgomery