What does the cryptic crossword clue "Narcissist keen to make a comeback (4)" mean?

The definition is "Narcissist". The wordplay uses a reversal. reverse of AVID = DIVA; definition: "Narcissist" The answer is Diva.

Narcissist keen to make a comeback (4)

Telegraph Prize Cryptic #3102 | 24 Across | 2021-04-04 flower