Possible Clues:

• Tiger seen roaming parkland in Tanzania
• Calm around government's leadership? It's going the other way, that's plain
• Place surrounding unusually green island's national park
• I must support possibly greenest region in Tanzania
• Plain covers turning green in first class
• African plain
• Plain site with green eruption
• Green site's wasted, that's plain
• Right to enter observed — obtain one for National Park
• Tanzanian wildlife area