China to annex central region in large coastal town (7)
I believe the answer is:
margate
'large coastal town' is the definition.
'Margate' can be an answer for 'town'. I am not sure about the 'large coastal' bit.
'china to annex central region in' is the wordplay.
'china' becomes 'mate' (china plate is Cockney rhyming slang for mate).
'to annex' becomes 'rg' (I can't justify this - if you can you should believe this answer much more).
'central' indicates the central letters.
'region' becomes 'tract' (both can mean a large piece of land).
'in' indicates putting letters inside.
The middle of 'tract' is 'a'.
'rg'+'a'='rga'
'mate' placed around 'rga' is 'MARGATE'.
Can you help me to learn more?
(Other definitions for margate that I've seen before include "Kentish Town?" , "resort town" , "coastal resort" , "N. Kent seaside resort" , "place in England" .)