Jazz legend Fitzgerald (4)
I believe the answer is:
ella
'jazz legend fitzgerald' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ella that I've seen before include "---- Fitzgerald, 'Queen of Jazz'" , ".... Fitzgerald, late great jazz diva" , "- Wheeler Wilcox, US poet" , "Woman" , "Great late jazz singer . . . . Fitzgerald" .)