Answer: dieout

AnswerCrossword Clue
DIEOUTBecome extinct
DIEOUTGo the way of the dodo
DIEOUTFade to nothing
DIEOUTCool off, as a fad
DIEOUTFade away
DIEOUTProve unsustainable
DIEOUTDisappear.
DIEOUTEmulate the dodo
DIEOUTFade
DIEOUTGo extinct
DIEOUTEnd like the dodo
DIEOUTGo the way of the dinosaurs