How many letters does the top answer for “a german courtesy title or form of address for an adult woman” have?

The most common answer is frau (4 letters).

Crossword clue: a german courtesy title or form of address for an adult woman

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

frau 4 letters wn-def

a German courtesy title or form of address for an adult woman