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

The most common answer is lawrence (8 letters).

Crossword clue: wrote the rainbow

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

lawrence 8 letters wd-fact-v3

a town in northeastern Kansas on the Kansas River; scene of raids by John Brown in 1856

wrote gravity's rainbow 67% similar → pynchon

wrote rainbow valley 67% similar → montgomery

wrote 1q84 50% similar → murakami

wrote 2666 50% similar → bolano

wrote 4 3 2 1 50% similar → auster

wrote q11368 50% similar → kernighan, ritchie

wrote q13415681 50% similar → hamill

wrote q134773 50% similar → zemeckis