Director's workplace covers most of the rent backing, for example, One African Grassland (9)
I believe the answer is:
serengeti
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for serengeti that I've seen before include "Tanzanian national park area" , "Wildlife-rich region of Africa" , "area of the plain" , "Tanzanian plain renowned for its wildlife" , "region in Tanzania" .)