Crossword Genius

Ceremony involving King in each country (7)

Ross

I believe the answer is:

germany

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

'country' is the definition.
(Germany is an example)

'ceremony involving king in each' is the wordplay.
I cannot quite understand how this works, but
'king' could be 'er' (abbreviation for Edward Rex, various English kings) and 'er' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for germany that I've seen before include "nation of Europe" , "European federal republic" , "EU member" , "Mary, gen up on the country" , "Mid-European country" .)

I've seen this clue in The Telegraph.
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