How many letters does the top answer for “an idealistic social reformer” have?

The most common answer is utopian (7 letters).

Crossword clue: an idealistic social reformer

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

utopian 7 letters wn-def

of or pertaining to or resembling a utopia