Evidently a person of vision (4)

I believe the answer is:

seer

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'person of vision' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for seer that I've seen before include "about a couple of pounds over there" , "I envisage" , "Forecaster" , "Soothsayer" , "One who knows the future" .)

I've seen this clue in the Evening Standard.

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