European gentleman of Norse origin? (5)

I believe the answer is:

senor

I'm a little stuck... Click here to teach me more about this clue!

'european gentleman' is the definition.
'senor' can be an answer for 'gentleman' (I have seen 'Spanish gentleman' mean 'senor' so perhaps 'gentleman' could also mean 'senor'). I'm not certain of the 'european' bit.

'norse origin?' is the wordplay.
'norse' can be anagrammed to 'SENOR'.
Though, I am not clear how the anagram is indicated.

'of' is the link.

Can you help me to learn more?

(Other definitions for senor that I've seen before include "Spanish title" , "Spanish chap" , "Snore like Spanish gent" , "Snore like Spanish man" , "Snore (anag.)" .)

I've seen this clue in the Evening Standard.

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