Peer at real form (4)
I believe the answer is:
earl
'peer' is the definition.
(I know that earl is a type of peer)
'real form' is the wordplay.
'form' is an anagram indicator (another form of the letters).
'real' with letters rearranged gives 'EARL'.
'at' is the link.
(Other definitions for earl that I've seen before include "British nobleman" , "Husband of a countess" , "Lear (anag)" , "Rank immediately above viscount" , "Male member of British nobility" .)