Pre-euro Greek currency (7)
I believe the answer is:
drachma
'pre-euro greek currency' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for drachma that I've seen before include "Former unit of money in Greece" , "Old Greek settler" , "ready" , "Formerly the basic unit of money in Greece" , "Old brass" .)