How many letters does the top answer for “author of post office” have?

The most common answer is bukowski (8 letters).

Crossword clue: author of post office

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

bukowski 8 letters wd-fact-v3

author of the post office girl 75% similar → zweig

the post or office of a monitor. 50% similar → monitorship

the post or office of legate 50% similar → legateship, legation

wrote post office 50% similar → bukowski