Egyptian river (4)
I believe the answer is:
nile
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">egyptian river</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 nile that I've seen before include "'The longest river, blue and white (4)'" , "White or Blue river of Africa" , "white flower?" , "Cairo's river" , "River of Egypt" .)