How many letters does the top answer for “author of violin concerto in e minor” have?

The most common answer is mendelssohn (11 letters).

Crossword clue: author of violin concerto in e minor

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

mendelssohn 11 letters wd-fact-v3

German musician and romantic composer of orchestral and choral works (1809-1847)

composer of violin concerto in e minor 67% similar → mendelssohn

wrote violin concerto in e minor 67% similar → mendelssohn

author of violin concerto 60% similar → berg, tchaikovsky