The most common and most likely answer to this crossword clue is the 3 plus 3 plus 4 plus 4 letter word AND ALL THAT JAZZ
I've seen this crossword clue in Financial Times
A
N
D
A
L
L
T
H
A
T
J
A
Z
Z
More clues leading to the result AND ALL THAT JAZZ
Buddy explains!

The straight part
We know that "etc . . ." is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case etc . . . = and all that jazz.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.