No mere mortal, I guess (6)

I believe the answer is:

divine

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'guess' is the definition.
(divining is a kind of guessing)

I can't explain the rest of the clue.

(Other definitions for divine that I've seen before include "Apprehend" , "Of or coming from God" , "Find water" , "clergyman" , "Supreme" .)

I've seen this clue in the Evening Standard.

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