Standard monetary unit of Vietnam (4)

I believe the answer is:

dong

(Other definitions for dong that I've seen before include "Lear's one had a luminous nose" , "Deep ringing sound" , "Deep resonant clang - Vietnamese monetary unit" , "The --- with a Luminous Nose (Lear)" , "Ding's partner?" .)

I've seen this clue in The Mirror and The Telegraph.

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