Cryptic crossword clue
GNP’s fine! Rolling in cash … once 8

The most common and most likely answer to this crossword clue is the 8 letter word PFENNIGS

P
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Buddy explains!

The straight part
We know that "cash … once" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cash … once = pfennigs.
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 PFENNIGS mean?

PFENNIGS noun
  1. One hundredth of the former German mark (Deutsche Mark).

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