Real sort of peer (4)
I believe the answer is:
earl
'peer' is the definition.
(I know that earl is a type of peer)
'real sort' is the wordplay.
'sort' is an anagram indicator.
'real' anagrammed gives 'EARL'.
'of' acts as a link.
(Other definitions for earl that I've seen before include "British nobleman" , "House member" , "Lear (anag)" , "Aristocrat ranking between marquis and viscount" , "Jimmy Carter's middle name" .)