Some fear loaded aristocrat (4)
I believe the answer is:
Here is my best explanation:
'aristocrat' is the definition.
(earl is a kind of aristocrat)
'some fear loaded' is the subsidiary indication.
'some' indicates the answer is hidden within the clue (Some of the parts of the word are used).
'earl' is hidden within 'fear loaded'.
(Other definitions for earl that I've seen before include "A real sort of lord", "Peer (Br.)", "-- Grey, PM 1830-34", "Countesss husband", "UK nobleman ranking between marquess and viscount", "Essex, say", "Real (anag) - nobleman", "rank", "British nobleman" and "Male member of British nobility".)