Crossword Genius

Island monster back to enthral a land (7)

Ross

I believe the answer is:

croatia

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

'island' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'monster back to enthral a land' is the wordplay.
'monster' becomes 'orc' (fantasy creature).
'back' is a reversal indicator.
'to enthral a land' becomes 'atia' (I can't justify this - if you can you should believe this answer much more).
'orc' reversed gives 'cro'.
'cro'+'atia'='CROATIA'

Can you help me to learn more?

(Other definitions for croatia that I've seen before include "European state" , "Republic in SE Europe, capital Zagreb" , "Adriatic nation" , "Balkan republic, capital Zagreb" , "Split country?" .)

I've seen this clue in The Sun.
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