Southern African kingdom (7)
I believe the answer is:
lesotho
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">southern african kingdom</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(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" .)