How many letters does the top answer for “author of der rosenkavalier” have?

The most common answer is hofmannsthal (12 letters).

Crossword clue: author of der rosenkavalier

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

hofmannsthal 12 letters wd-fact-v3

strauss 7 letters wd-fact-v3

Austrian composer of waltzes (1804-1849)

author of der messias 50% similar → klopstock

author of der mond 50% similar → orff

author of der zauberlehrling 50% similar → goethe

composer of der rosenkavalier 50% similar → hofmannsthal, strauss

wrote der rosenkavalier 50% similar → hofmannsthal, strauss