Greek deity in Egyptian port set up (4)
I believe the answer is:
zeus
'greek deity' is the definition.
(Zeus is an example)
'egyptian port set up' is the wordplay.
'egyptian port' becomes 'suez' (I've seen this before).
'set up' says the letters should be written in reverse.
'suez' reversed gives 'ZEUS'.
'in' acts as a link.
(Other definitions for zeus that I've seen before include "Celestial ruler" , "Ancient Greece's top god" , "Chief Greek god" , "old Greek" , "Chief Olympian god" .)