Old European gold coin (5)

I believe the answer is:

ducat

'old european gold coin' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for ducat that I've seen before include "Money no longer" , "Mad; fruit" , "tender once" , "Former Eur. gold coin" , "Old gold coin in e.g. Venice" .)

I've seen this clue in The Guardian and The Washington Post.

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