Egyptian canal upsetting a Greek god (4)
I believe the answer is:
suez
'egyptian canal' is the definition.
(I've seen this before)
'upsetting a greek god' is the wordplay.
'upsetting' shows that the letters should be reversed in order.
'a greek god' becomes 'zeus' (Zeus is an example).
'zeus' written backwards gives 'SUEZ'.
(Other definitions for suez that I've seen before include "Canal zone" , "fall of Eden?" , "Site of canal" , "Nineteen Fifty-Six crisis canal" , "Name of canal" .)