It could well be spent in Japan (3)

I believe the answer is:

yen

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'it could well be spent in japan' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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(Other definitions for yen that I've seen before include "Intense desire for a Japanese coin" , "Long for Japanese money?" , "Longing for a currency unit" , "foreign currency" , "Urge" .)

I've seen this clue in the Evening Standard.

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