How many letters does the top answer for “wrote las vegas” have?

The most common answer is ladd (4 letters).

Crossword clue: wrote las vegas

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

ladd 4 letters wd-fact-v3

wrote fear and loathing in las vegas 60% similar → gilliam, thompson

author of las vegas 50% similar → ladd

landmark in las vegas 50% similar → ariaresortandcasino

who wrote the novel 'fear and loathing in las vegas' 50% similar → hunter, thompson