One exchanging with beer supplier leaving northern Germany for western Romania (8)

I believe the answer is:

barterer

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'one exchanging with beer supplier leaving northern germany for western romania' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

This is the entire clue.

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(Other definitions for barterer that I've seen before include "Rarer bet for trader who swaps" , "Trader who exchanges goods, not money" .)

I've seen this clue in The Independent.

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