Area of Europe crumbling into sea (7)

I believe the answer is:

estonia

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'area of europe' is the definition.
'Estonia' can be an answer for 'area' (Estonia is an example). I'm not sure about the 'of europe' bit.

'crumbling into sea' is the wordplay.
'crumbling' indicates an anagram.
'into'+'sea'='intosea'
'intosea' is an anagram of 'ESTONIA'.

Can you help me to learn more?

(Other definitions for estonia that I've seen before include "Northern European country" , "Baltic state" , "East European country" , "'So eat in here in Tallinn, say (7)'" , "So eat in about here in Northern Europe" .)

I've seen this clue in The Guardian.

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