How many letters does the top answer for “the freshness and vitality characteristic of a young person” have?

The most common answer is juvenility (10 letters).

Crossword clue: the freshness and vitality characteristic of a young person

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

juvenility 10 letters wn-def

the freshness and vitality characteristic of a young person

youthfulness 12 letters wn-def

the freshness and vitality characteristic of a young person