Exotic dish found in eastern county where bodies were buried (9)
I believe the answer is:
catacombs
'where bodies were buried' is the definition.
(historical type of burial site)
'exotic dish found in eastern county' is the wordplay.
'exotic dish' becomes 'taco' (Mexican dish).
'found in' is an insertion indicator.
'eastern county' becomes 'Cambs' (abbreviation for Cambridgeshire).
'taco' inserted inside 'cambs' is 'CATACOMBS'.
(Other definitions for catacombs that I've seen before include "Underground cemeteries constructed by the ancient Romans" , "burial place" , "Underground tombs" , "Underground burial places" , "Vaults" .)