Look at one's equal (4)
I believe the answer is:
peer
This clue is a double definition.
'look at' is the first definition.
(I've seen this in another clue)
'one's equal' is the second definition.
(I've seen this before)
(Other definitions for peer that I've seen before include "Member of the nobility" , "Look with difficulty; equal" , "unelected politician" , "Coequal" , "Equal; nobleman" .)