National park, variegated green site (9)
I believe the answer is:
serengeti
'national park' is the definition.
(I've seen this before)
'variegated green site' is the wordplay.
'variegated' indicates anagramming the letters.
'green'+'site'='greensite'
'greensite' anagrammed gives 'SERENGETI'.
(Other definitions for serengeti that I've seen before include "Tanzanian wildlife area" , "Tanzanian national park area" , "place to watch game" , "area of Tanzania" , "area of the plain" .)