How many letters does the top answer for “wrote to build a fire” have?

The most common answer is london (6 letters).

Crossword clue: wrote to build a fire

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

london 6 letters wd-fact-v3

the capital and largest city of England; located on the Thames in southeastern England; financial and industrial and cul

wrote under fire 67% similar → barbusse

author of to build a fire 50% similar → london

wrote fire in the steppe 50% similar → sienkiewicz

wrote pale fire 50% similar → nabokov

wrote with fire and sword 50% similar → sienkiewicz