Victoria Falls river (7)
I believe the answer is:
zambezi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">victoria falls river</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for zambezi that I've seen before include "Southern Africa river" , "River flowing over Victoria Falls" , "River flowing into Indian Ocean northeast of Beira in Mozambique" , "Maze biz (anag.); African river" , "Zambia/Zimbabwe border river" .)