How many letters does the top answer for “wrote the lion king” have?

The most common answer is rice (4 letters).

Crossword clue: wrote the lion king

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

rice 4 letters wd-fact-v3

grains used as food either unpolished or more often polished

rogen 5 letters wd-fact-v3

wrote mufasa: the lion king 75% similar → rogen

wrote the king and i 67% similar → rodgers

author of the lion king 50% similar → rice, rogen

composer of the lion king 50% similar → glover, rice

director of the lion king 50% similar → broderick, ejiofor, rogen

wrote idylls of the king 50% similar → tennyson

wrote king lear 50% similar → shakespeare

wrote the king in yellow 50% similar → chambers