The most common and most likely answer to this crossword clue is the 10 letter word EURODOLLAR
I've seen this crossword clue in Financial Times
E
U
R
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More clues leading to the result EURODOLLAR
Buddy explains!
The straight part
We know that "Currency held to assist trade" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case currency held to assist trade = eurodollar.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 EURODOLLAR mean?
EURODOLLAR noun- A deposit, in US dollars, held in a bank outside of the United States (no longer necessarily in Europe)
- Person living or originating from Europe
- Person who resides within the European Union
- The currency unit of the European Monetary Union. Symbol: €
- A coin with a face value of 1 euro.
- Macropus robustus, a wallaroo (macropod species).