How many letters does the top answer for “the quality of expressing or arousing sexual desire” have?

The most common answer is sultriness (10 letters).

Crossword clue: the quality of expressing or arousing sexual desire

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

sultriness 10 letters wn-def

the quality of expressing or arousing sexual desire

capable of arousing sexual desire 50% similar → delectable