Rising canal reveals God (4)
I believe the answer is:
zeus
'god' is the definition.
(Zeus is an example)
'rising canal' is the wordplay.
'rising' shows that the letters should be reversed in order (going up in a down clue).
'canal' becomes 'suez' (I've seen this before).
'suez' back-to-front is 'ZEUS'.
'reveals' acts as a link.
(Other definitions for zeus that I've seen before include "Great being in Greece" , "Greek god - husband and brother of Hera" , "Suez (anag)" , "His statue was one of Seven Wonders of the World" , "Greeks' supreme deity" .)