How many letters does the top answer for “activity indicative of belief in the superiority of men over women” have?

The most common answer is antifeminism (12 letters).

Crossword clue: activity indicative of belief in the superiority of men over women

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

antifeminism 12 letters wn-def

activity indicative of belief in the superiority of men over women

chauvinism 10 letters wn-def

activity indicative of belief in the superiority of men over women