How many letters does the top answer for “composer of pretty little liars: the perfectionists” have?

The most common answer is pieterse (8 letters).

Crossword clue: composer of pretty little liars: the perfectionists

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

pieterse 8 letters wd-fact-v3

composer of pretty little liars 80% similar → hale, pieterse

author of pretty little liars 50% similar → shepard

director of pretty little liars 50% similar → bellisario

wrote pretty little liars 50% similar → shepard