Crossword clue: an arabian shrub catha edulis) the leaves of which are used as tea by the arabs.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
the leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric sti