A noble look (4)
I believe the answer is:
peer
This clue is a double definition.
'a noble' is the first definition.
(peers are members of the nobility)
'look' is the second definition.
(to peer at something is to look at it)
(Other definitions for peer that I've seen before include "Look closely - nobleman" , "Look closely at equal" , "Equal; nobleman" , "Struggle to see; equal" , "Noble; look with difficulty" .)