Crossword clue: a purposeful or industrious undertaking (especially one that requires effort or boldness)

The most common answer is endeavor (8 letters).

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

Possible answers

endeavor 8 letters wn-def

a purposeful or industrious undertaking (especially one that requires effort or boldness)

enterprise 10 letters wn-def

a purposeful or industrious undertaking (especially one that requires effort or boldness)