God whose reflection is seen in canal (4)

I believe the answer is:

zeus

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'god' is the definition.
(Zeus is an example)

I don't understand the remainder of the clue.

(Other definitions for zeus that I've seen before include "Supreme Greek deity" , "Chief Olympian deity" , "King of Greek gods" , "Greek god - husband and brother of Hera" , "Greek god of gods" .)

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