How many letters does the top answer for “the commercial activity of buying and bringing in goods from a foreign country” have?

The most common answer is importation (11 letters).

Crossword clue: the commercial activity of buying and bringing in goods from a foreign country

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

importation 11 letters wn-def

the commercial activity of buying and bringing in goods from a foreign country

importing 9 letters wn-def

the commercial activity of buying and bringing in goods from a foreign country