How many letters does the top answer for “not aggressive; not given to fighting or assertiveness” have?

The most common answer is nonaggressive (13 letters).

Crossword clue: not aggressive; not given to fighting or assertiveness

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

nonaggressive 13 letters wn-def

not aggressive; not given to fighting or assertiveness

unaggressive 12 letters wn-def

not aggressive; not given to fighting or assertiveness