I've googled til I'm dizzy but can't get it quite right17d small purple fruit of S.American tree of the genus Eutrepe - that's acai - is plural acaii as I need five letters
and Old Greek coin woth a sixth of a drachma - have ob?l??
any help appreciated then I have finished.
"any of several slender Brazilian palms of the genus Euterpe,especially E. edulis,a species bearing a purple fruit from whicha beverage is made by infusion."