Possible Clues:

• Fleeting and momentary eminence, initially?
• Note or two
• It's well-known to be the spur, according to Milton (4)
• Musical (celebrity?)
• Great renown
• 'A fickle food upon a shifting plate,' according to Emily Dickinson
• Greatness
• It's well known to be Milton's spur
• Irene Cara song
• Rage when lecturer's ignored celebrity