Insane to anger Number One close to Spanish government? (9)

I believe the answer is:

madrileno

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

'one close to spanish government?' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'insane to anger number' is the wordplay.
'insane' becomes 'mad' (synonyms).
'to anger' becomes 'rile' (rile can mean to annoy or anger).
'number' becomes 'no' (abbreviation for 'number').
'mad'+'rile'+'no'='MADRILENO'

Can you help me to learn more?

(Another definition for madrileno that I've seen is " Spaniard".)

I've seen this clue in The Times.

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