Look for social equal (4)
I believe the answer is:
peer
I believe this is a double definition.
'look' is the first definition.
(to peer at something is to look at it)
'social equal' is the second definition.
(I've seen this before)
'for' is the link.
(Other definitions for peer that I've seen before include "Look closely at titled man?" , "Look closely at equal" , "Look searchingly at lord?" , "Peep; nobleman" , "Aristocrat" .)