Egyptian peninsula (5)
I believe the answer is:
sinai
'egyptian peninsula' is the definition.
(I've seen this before)
This is the entire clue.
(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" .)