Possible Clues:

• Sierra -- (African country)
• Sign with direction for director
• Sierra -- (African nation)
• 1960's The Colossus of Rhodes was his directorial debut
• See lion almost catch African rhino
• Director of "A Fistful of Dollars"
• ''Fistful of Dollars'' director Sergio
• Noted spaghetti Western director
• Italian director Sergio
• West Africa's Sierra ___