Wants to live around a watery Eurasian expanse (5,3)
I believe the answer is:
black sea
'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" .)