Official language of Egypt (6)
I believe the answer is:
arabic
'official language of egypt' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for arabic that I've seen before include "Gum --, ingredient of glue and incense" , "CIA bar on this Middle East language" , "Language (by gum!)" , "Major language of Middle East" , "Final" .)