Answer:

cassis

Answer	Crossword Clue
CASSIS	Cordial preferred by Hercule Poirot
CASSIS	Currant-flavored cordial
CASSIS	"Berry" nice cordial?

CASSIS	Currant-flavored liqueur
CASSIS	Black-currant liqueur
CASSIS	Hercule Poirot's favorite drink
CASSIS	Black currant, used in French vermouth.
CASSIS	Vermouth ....
CASSIS	Black currant liqueur.
CASSIS	Creme de ... (liqueur)
CASSIS	Type of brandy

CASSIS	Black currant liqueur
CASSIS	Black currant
CASSIS	Black currant flavor in wines
CASSIS	Kir ingredient
CASSIS	Black currant cordial
CASSIS	Kir flavorer