Crossword Genius

Wants to live around a watery Eurasian expanse (5,3)

Ross

I believe the answer is:

black sea

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

'watery eurasian expanse' is the definition.
The definition and answer can be both natural objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'wants to live around a' is the wordplay.
'wants' becomes 'lacks' ('lack' can be a synonym of 'want'**).
'to live' becomes 'be' ('be' can be a synonym of 'live').
'around' means one lot of letters goes inside another.
'lacks' going into 'be' is 'blackse'.
'blackse'+'a'='BLACK SEA'

Can you help me to learn more?

(Other definitions for black sea that I've seen before include "large amount of water" , "Quantity of water" , "Body of water bounding Russia etc. - sounds murky" , "Body of water between southeast Europe and Asia" , "What lies north of the Bosphorus" .)

I've seen this clue in The Telegraph.
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