Crossword Puzzle African tablelands

Clue: African tablelands

African insect (e.g. TSETSE with 6 letters)
African teas (KATS with 4 letters)
West African vegetable (YAM with 3 letters)
African irrigator (NILE with 4 letters)
Largest African desert (SAHARA with 6 letters)
East African capital (ADDISABABA with 10 letters)
African orchids (DISAS with 5 letters)
African tribe (e.g. BANTU with 5 letters)
What the South African province Free State was called a century ago (OANGERIVERCOLON with 15 letters)
African rulers (DEYS with 4 letters)