Answer: dieout

AnswerCrossword Clue
DIEOUT

Become extinct

DIEOUT

Go the way of the dodo

DIEOUT

Fade to nothing

DIEOUT
Cool off, as a fad
DIEOUT
Fade away
DIEOUTProve unsustainable
DIEOUTDisappear.
DIEOUTEmulate the dodo
DIEOUTFade
DIEOUTGo extinct
DIEOUTEnd like the dodo
DIEOUTGo the way of the dinosaurs