Well, we are talking the 3rd, 23rd and 26th most common letters in the alphabet when it comes to jazz. No wonder no one likes jazz.

I like jazz. Night Train by Oscar Peterson is one of my desert island albums.
Six letters. No clue? Seems a might unfair. You wouldn't be devious enough to try what I'm thinking would you?
Let the killing begin!
E as in egregious?