Crossword Genius

Ol' Blue-eyes (7)

Ross

I believe the answer is:

sinatra

(Other definitions for sinatra that I've seen before include "Francis Albert ..., singer and actor" , "Francis Albert, late lamented crooner" , "Francis Albert, mourned singer" , "Something of a strain for top crooner" , "Old singer" .)

I've seen this clue in the Sydney Morning Herald.
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