Olympian in Egyptian port coming north (4)
I believe the answer is:
zeus
'olympian' is the definition.
(Greek god who lived on Mount Olympus)
'egyptian port coming north' is the wordplay.
'egyptian port' becomes 'suez' (I've seen this before).
'coming north' is a reversal indicator.
'suez' back-to-front is 'ZEUS'.
'in' is the link.
(Other definitions for zeus that I've seen before include "Chief Olympian deity" , "Top Olympian" , "Suez (anag)" , "Ancient Greek god, son of Rhea and Cronus" , "God whose statue was one of the Seven Wonders" .)