How many letters does the top answer for “a temperamental disposition to be agreeable” have?

The most common answer is agreeability (12 letters).

Crossword clue: a temperamental disposition to be agreeable

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

agreeability 12 letters wn-def

a temperamental disposition to be agreeable

agreeableness 13 letters wn-def

a temperamental disposition to be agreeable