Cactus-Eating Insect Produces Red Carmine Dye

Puzzle 12 of Tolkien Universe Medium Pack

Question is: Cactus-Eating Insect Produces Red Carmine Dye

and the answer is: COCHINEAL

Word Meaning:

COCHINEAL — (countable) A scale insect of the species Dactylopius coccus, native to the tropical and subtropical Americas, which lives on prickly pear cacti (genus Opuntia).

Definitions from Wiktionary.