European capital previously sent back some abandoned luggage (6)
I believe the answer is:
gulden
'european capital previously sent' is the definition.
I can't tell whether this defines the answer.
'back some abandoned luggage' is the wordplay.
'back' says the letters should be written in reverse.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'nedlug' can be found hidden inside 'abandoned luggage'.
'nedlug' back-to-front is 'GULDEN'.
Can you help me to learn more?
(Another definition for gulden that I've seen is " Unit of money in the Netherlands, formerly".)