Place is an eyesore we hear (4)
I believe the answer is:
site
'place' is the definition.
(I know that site is a type of place)
'an eyesore we hear' is the wordplay.
'an eyesore' becomes 'sight' (I've seen this before).
'we hear' shows a homophone (sound like).
'sight' is a homophone of 'SITE'.
'is' is the link.
(Other definitions for site that I've seen before include "Locality" , "Position; situation" , "Spot, location" , "Ties into building location" , "Location; locate" .)