How many letters does the top answer for “belonging to the middle class” have?

The most common answer is bourgeois (9 letters).

Crossword clue: belonging to the middle class

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

bourgeois 9 letters wn-def

a member of the middle class

a member of the middle class 50% similar → bourgeois, burgher

belonging to the class tetrandria. 50% similar → tetrandrian, tetrandrous

of or belonging to the class crustacea 50% similar → crustacean