The most common and most likely answer to this crossword clue is the 8 plus 5 letter word ENTRANCE MONEY
I've seen this crossword clue in The Daily Telegraph
E
N
T
R
A
N
C
E
M
O
N
E
Y
Buddy explains!
The straight part
We know that "Charm and wealth that buys one’s way in" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case charm and wealth that buys one’s way in = entrance money.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.