How many letters does the top answer for “wrote sleeping murder” have?

The most common answer is christie (8 letters).

Crossword clue: wrote sleeping murder

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

christie 8 letters wd-fact-v3

prolific English writer of detective stories (1890-1976)

author of sleeping murder 50% similar → christie

wrote a murder is announced 50% similar → christie

wrote the sleeping beauty 50% similar → petipa, tchaikovsky