How many letters does the top answer for “wrote marriage and morals” have?

The most common answer is russell (7 letters).

Crossword clue: wrote marriage and morals

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

russell 7 letters wd-fact-v3

English philosopher and mathematician who collaborated with Whitehead (1872-1970)

wrote marriage 67% similar → gogol

author of marriage and morals 50% similar → russell

wrote the marriage of figaro 50% similar → beaumarchais