Crossword clue: one of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
a needlelike part or structure of a plant or animal or crystal; as a spine or bristle or crystal