Viewer, wise, savvy, astute in the end (3)

I believe the answer is:

eye

'viewer' is the definition.
(organ which sees or views)

'wise savvy astute in the end' is the wordplay.
'in the end' suggests the final letters.
The last letters of 'wise savvy astute' are 'EYE'.

(Other definitions for eye that I've seen before include "Location of 11dn" , "9 across village" , "One looks" , "Needle or lace hole" , "Storm-centre" .)

I've seen this clue in The Times.

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