Egyptian peninsula (5)
I believe the answer is:
sinai
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">egyptian peninsula</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 sinai that I've seen before include "place to receive instructions about behaviour" , "Mountain in Egypt" , "Part of 10 [EGYPT]" , "Mt. where Moses received 10 Commandments" , "desert area" .)