The most common and most likely answer to this crossword clue is the 8 letter word CLAWBACK
I've seen this crossword clue in The Daily Telegraph
C
L
A
W
B
A
C
K
Buddy explains!
The straight part
We know that "financial recoupment" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case financial recoupment = clawback.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 CLAWBACK mean?
CLAWBACK noun- A rule that permits a party to take back evidentiary materials that were mistakenly turned over to the other party but to which the other party would not have been entitled.
- Money that a party is entitled to keep under one tax provision but is taken by another tax provision.
- Any recovery of a performance-related payment based on discovery that the performance was not genuine.
- A flatterer or sycophant.