Possible Clues:

• Violin star Archives
• East African country
• Sand in storm round university in country
• Nag from Ugandans' divided Arab country?
• Darfur's locale
• Fifty per cent dark in lighter country
• Its largest city is Omdurman
• Jebel Aulia Dam site
• Country where Alsarah & the Nubatones are from
• Formerly the largest country in Africa, but since 2011 the third-largest