European, perhaps? Yes, a Pole (3)

'european' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'perhaps? yes a pole' is the wordplay.
I cannot really understand how this works, but
'a' could be 'an' and 'an' is found in the answer.
A single letter 'j' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?