Answer: gambier

AnswerCrossword Clue
gambieran extract from an Asian vine, also GAMBIA, GAMBIR
gambiera yellowish catechu that is obtained from a tropical southeast Asian woody vine (Uncaria gambir) of the madder family and is used for chewing with the betel nut and for tanning and dyeing
gambierastringent extract obtained from the leaves and young shoots of a tropical Asian shrub, Uncaria gambir, of the madder family, used in medicine, dyeing, tanning, etc.