Crossword clue: a colorless crystalline substance extracted from the capsicum annuum, and giving off vapors of intense acridity.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
colorless pungent crystalline compound derived from capsicum; source of the hotness of hot peppers of the genus Capsicum