How many letters does the top answer for “to become young again.” have?

The most common answer is vernate (7 letters).

Crossword clue: to become young again.

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

vernate 7 letters web-def

To become young again. [Obs.]

to adopt again. young. 50% similar → readopt

to render young again. 50% similar → rejuvenate

to write again. young. 50% similar → rewrite