How many letters does the top answer for “director of how i met your mother” have?

The most common answer is fryman (6 letters).

Crossword clue: director of how i met your mother

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

fryman 6 letters wd-fact-v3

harris 6 letters wd-fact-v3

publisher of the first newspaper printed in America (1673-1713)

author of how i met your mother 67% similar → harris

wrote how i met your mother 67% similar → harris