The country of Somalia? (4)
I believe the answer is:
mali
'the country' is the definition.
(Mali is an example)
'of somalia?' is the wordplay.
'of' says the answer is hidden in the clue.
'MALI' is hidden within 'somalia'.
(Other definitions for mali that I've seen before include "African country, once French Sudan" , "Timbuktu is in this landlocked country" , "African state's" , "African country, former French colony" , "W. African country" .)