Male aristocrat (4)
I believe the answer is:
earl
'male aristocrat' is the definition.
(earl is a kind of male aristocrat)
This is all the clue.
(Other definitions for earl that I've seen before include "Lear (anag)" , "Countess his wife" , "Countesss husband" , "Aristocrat ranking between marquis and viscount" , "Peer (Br.)" .)