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

The most common answer is king (4 letters).

Crossword clue: wrote the colorado kid

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

king 4 letters wd-fact-v3

a male sovereign; ruler of a kingdom

author of the colorado kid 50% similar → king