Royal family's survival after removal of head of government by Scotsman (10)

I believe the answer is:

hanoverian

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

'royal family's survival' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'removal of head of government by scotsman' is the wordplay.
'removal of head of government' becomes 'hanover' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'by' is a charade indicator (letters next to each other).
'scotsman' becomes 'ian'.
'hanover'+'ian'='HANOVERIAN'

'after' acts as a link.

Can you help me to learn more?

(Other definitions for hanoverian that I've seen before include "Any sovereign from George I to Victoria" , "Eg, like George I" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.