Answer: fading

AnswerCrossword Clue
FADINGGetting lighter
FADINGBecoming hard to see
FADINGLanguishing.
FADINGWithering
FADINGAbout to be a has-been
FADINGNot doing well in a race
FADINGLike some memories
FADINGOn the way out
FADINGLosing popularity
FADINGLike the sun at sunset
FADINGOn the decline
fadingan Irish dance
fadingto lose freshness, color, or vitality
fadingto cause to fade
fadingto disappear gradually