Bury stores port for country's central region (8)
I believe the answer is:
interior
'country's central region' is the definition.
'bury stores port' is the wordplay.
'bury' becomes 'inter' (synonyms).
'stores' is an insertion indicator.
'port' becomes 'rio' (I've seen this before).
'inter' going around 'rio' is 'INTERIOR'.
'for' is the link.
(Other definitions for interior that I've seen before include "The region inside" , "Inner; inland" , "The inside of anything" , "Inside part" , "Private" .)