How many letters does the top answer for “composer of you're my heart, you're my soul” have?

The most common answer is bohlen (6 letters).

Crossword clue: composer of you're my heart, you're my soul

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

bohlen 6 letters wd-fact-v3

author of you're my heart, you're my soul 67% similar → bohlen

wrote you're my heart, you're my soul 67% similar → bohlen

composer of you'll be in my heart 50% similar → collins