Newspaper article covering eastern Greek export (4)
I believe the answer is:
feta
'greek export' is the definition.
'newspaper article covering eastern' is the wordplay.
'newspaper' becomes 'ft'.
'article' becomes 'a' (indefinite article).
'covering' is an insertion indicator.
'eastern' becomes 'e'.
'ft'+'a'='fta'
'fta' enclosing 'e' is 'FETA'.
(Other definitions for feta that I've seen before include "A ewe's, goat's milk cheese" , "Type of cheese" , "Salty goat or sheep milk cheese" , "Soft Greek cheese" , "Greek cheese from goat or sheep milk" .)