How many letters does the top answer for “one who spreads real or alleged scandal about another” have?

The most common answer is muckraker (9 letters).

Crossword clue: one who spreads real or alleged scandal about another

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

muckraker 9 letters wn-def

one who spreads real or alleged scandal about another

mudslinger 10 letters wn-def

one who spreads real or alleged scandal about another