Spaniard of Roman origin? (5)

I believe the answer is:

ramon

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

'spaniard' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'roman origin?' is the wordplay.
'roman' anagrams to 'RAMON'.
Though, I am unsure how the anagram is indicated.

'of' acts as a link.

Can you help me to learn more?

Want a hint initially instead of a full solution? Install my app