Ella's style (4)
I believe the answer is:
scat
'ella's style' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for scat that I've seen before include "Jazz singing - animal droppings - silvery fish" , "One way of singing" , ""Beat It"" , "Wordless jazz singing" , "Buzz off" .)