Crossword Clue:

INDIGO a blue dye

AnswerCrossword Clue
ANILBlue dye obtained from indigo
METHYL... blue (a basic dye)
ANILSource of a blue dye.
ANILShrub yielding a blue dye
ANILBlue dye from a plant
WOADBlue dye from a plant.
INDIGOSPlants that yield a blue dye