How many letters does the top answer for “the activity of protecting someone or something” have?

The most common answer is protection (10 letters).

Crossword clue: the activity of protecting someone or something

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

protection 10 letters wn-def

the activity of protecting someone or something