A person of vision (4)

I believe the answer is:

seer

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

This is all the clue.

(Other definitions for seer that I've seen before include "Person with unusual powers of foresight" , "One having visions of the future" , "One divines the future" , "Oracle or prophet" , "One has unusual foresight" .)

I've seen this clue in the Evening Standard.

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