How many letters does the top answer for “the hair growing on the lower part of a man's face” have?

The most common answer is beard (5 letters).

Crossword clue: the hair growing on the lower part of a man's face

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

beard 5 letters wn-def

the hair growing on the lower part of a man's face

whiskers 8 letters wn-def

the hair growing on the lower part of a man's face