Southern African kingdom (7)
I believe the answer is:
lesotho
'southern african kingdom' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lesotho that I've seen before include "African territory" , "Country, an enclave of South Africa, capital Maseru" , "Country entirely within South Africa" , "Maseru is this Kingdom's capital" , "Landlocked country in southern Africa" .)