How many letters does the top answer for “completing its life cycle within a year” have?

The most common answer is annual (6 letters).

Crossword clue: completing its life cycle within a year

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

annual 6 letters wn-def

completing its life cycle within a year