The most common and most likely answer to this crossword clue is the 9 letter word CENTESIMO
I've seen this crossword clue in The Guardian
C
E
N
T
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Buddy explains!

The straight part
We know that "Formerly little money" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case formerly little money = centesimo.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 CENTESIMO mean?
CENTESIMO noun- A unit of currency constituting one hundredth of a lira.
- A monetary unit worth one-hundredth of the main currency in Uruguay, Panama and (formerly) Chile.