How many letters does the top answer for “collect in one place” have?

The most common answer is foregather (10 letters).

Crossword clue: collect in one place

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

foregather 10 letters wn-def

collect in one place

forgather 9 letters wn-def

collect in one place

one who accumulates; one who collects. 50% similar → cumulatist