How many letters does the top answer for “christian mysticism philosopher” have?

The most common answer is bingen (6 letters).

Crossword clue: christian mysticism philosopher

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

bingen 6 letters wd-fact-v3

stein 5 letters wd-fact-v3

a mug intended for serving beer

christian apologetics philosopher 50% similar → leibniz

christian church philosopher 50% similar → bessarion