Answer: angostura

AnswerCrossword Clue
ANGOSTURABitter bark.
ANGOSTURA... bitters (cocktail ingredient)
angosturathe bitter, aromatic bark of either of two South American citrus trees, Galipea officinalis or G. cusparia, used in medicine and in the preparation of liqueurs and bitters
angosturaa bitter aromatic bark, formerly used in medicine