How many letters does the top answer for “where something originated or was nurtured in its early existence” have?

The most common answer is provenance (10 letters).

Crossword clue: where something originated or was nurtured in its early existence

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

provenance 10 letters wn-def

where something originated or was nurtured in its early existence

provenience 11 letters wn-def

where something originated or was nurtured in its early existence