The most common and most likely answer to this crossword clue is the 13 letter word UPPER-BRACKET
U
P
P
E
R
-
B
R
A
C
K
E
T
Buddy explains!
The straight part
We know that "typical of high earners?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case typical of high earners? = upper-bracket.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.