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

The most common answer is graham (6 letters).

Crossword clue: wrote hacker news

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

graham 6 letters wd-fact-v3

flour made by grinding the entire wheat berry including the bran; (`whole meal flour' is British usage)

author of hacker news 50% similar → graham

wrote new atlantis 50% similar → bacon

wrote the new land 50% similar → sholokhov

wrote the new life 50% similar → pamuk

wrote yahoo news 50% similar → couric