How many letters does the top answer for “city in british columbia” have?

The most common answer is mission (7 letters).

Crossword clue: city in british columbia

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

mission 7 letters wd-fact-v3

an organization of missionaries in a foreign land sent to carry on religious work

bridge in british columbia 50% similar → skybridge

city in british raj 50% similar → srivijayapuram

landmark in british columbia 50% similar → whistlerolympicpark