Fresh greens with meat pie oddly unavailable in conservation area (9)
I believe the answer is:
serengeti
'conservation area' is the definition.
(national park in Tanzania)
'fresh greens with meat pie oddly unavailable' is the wordplay.
'fresh' indicates anagramming the letters.
'with' says to put letters next to each other.
'oddly unavailable' indicates alternate letters (letters in odd-numbered positions are removed).
'meat'+'pie'='meatpie'
The alternating letters of 'meatpie' are 'eti'.
'greens' anagrammed gives 'sereng'.
'sereng'+'eti'='SERENGETI'
'in' is the link.
(Other definitions for serengeti that I've seen before include "area of the plain" , "area of Tanzania" , "Tanzanian national park area" , "region in Tanzania" , "place to watch game" .)