How many letters does the top answer for “of or pertaining to health or hygiene; sanitary.” have?

The most common answer is hygienic (8 letters).

Crossword clue: of or pertaining to health or hygiene; sanitary.

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

hygienic 8 letters web-def

tending to promote or preserve health