Look at the fellow! (4)
I believe the answer is:
peer
I believe this is a double definition.
'look at' is the first definition.
(thesaurus)
'the fellow' is the second definition.
(I've seen this in other clues)
(Other definitions for peer that I've seen before include "Struggle to see; equal" , "Fellow" , "Squint" , "Look with difficulty; equal" , "Look hard through narrowed eyes" .)