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

The most common answer is simon (5 letters).

Crossword clue: wrote the goodbye girl

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

simon 5 letters wd-fact-v3

United States economist and psychologist who pioneered in the development of cognitive science (1916-2001)

author of the goodbye girl 50% similar → simon

wrote chelsea girls 50% similar → warhol

wrote funny girl 50% similar → streisand

wrote gossip girl 50% similar → ziegesar

wrote the bohemian girl 50% similar → novello

wrote the golden girls 50% similar → mcclanahan

wrote the long goodbye 50% similar → chandler

wrote the windup girl 50% similar → bacigalupi