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