The most common and most likely answer to this crossword clue is the 9 letter word PROFITEER
I've seen this crossword clue in The Sunday Telegraph
P
R
O
F
I
T
E
E
R
More clues leading to the result PROFITEER
- Paid and trained: at any time killings his speciality?
- Member of upper house maintaining backing for appeal gets cash in
- Don needs sex and drugs, ultimately another one who gains from Covid-19 situation?
- I collected rent for Peter Rachman?
- I prefer to rent from capitalist
- Make a quick buck for, well, alway
- Soldiers returned attack, cutting noble fellow after a killing
- Make too much money as academic, always concealing it
- Shark? Look round for it swimming
- Right old tantrum, taken in by fellow extortionist
Buddy explains!

The straight part
We know that "Make too much money" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case make too much money = profiteer.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.
What does PROFITEER mean?
PROFITEER noun- One who makes an unreasonable profit not justified by cost or risk, a rent seeker.
- To make an unreasonable profit not justified by cost or risk.