Green site revitalised in African National Park (9)
I believe the answer is:
serengeti
'african national park' is the definition.
(Tanzanian national park)
'green site revitalised' is the wordplay.
'revitalised' indicates anagramming the letters.
'green'+'site'='greensite'
'greensite' is an anagram of 'SERENGETI'.
'in' is the link.
(Other definitions for serengeti that I've seen before include "Green ties (anag.)" , "reserve for game" , "Afr. plain; green site (anag.)" , "area of Tanzania" , "region in Tanzania" .)