Great singer eager for comeback (4)

I believe the answer is:

diva

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'great singer' is the definition.
(term for a female opera singer)

I can't explain the rest of the clue.

(Other definitions for diva that I've seen before include "A female opera singer" , "fat lady?" , "Operatic soprano" , "Celebrated female operatic star" , "High-maintenace woman" .)

I've seen this clue in The Globe and Mail.

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