The most common and most likely answer to this crossword clue is the 8 letter word OVERDREW
I've seen this crossword clue in Financial Times
O
V
E
R
D
R
E
W
More clues leading to the result OVERDREW
Buddy explains!

The straight part
We know that "Got into debt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case got into debt = overdrew.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 OVERDREW mean?
OVERDREW verb- To withdraw more money from an account than there is credit; to make an overdraft
- To use a device for shooting arrows shorter than the draw of the bow.
- To exaggerate.
- To draw over the top of existing content.