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