Hairstyle concealing old man with a title (7)
I believe the answer is:
baronet
'title' is the definition.
(I've seen this before)
'hairstyle concealing old man with a' is the wordplay.
'hairstyle' becomes 'bret' (I can't justify this - if you can you should believe this answer much more).
'concealing' means one lot of letters goes inside another.
'old' becomes 'o' (abbreviation as in OT - Old Testament).
'man' becomes 'N' (knight, a man in chess).
'with' is an insertion indicator.
'o'+'n'='on'
'bret' enclosing 'on' is 'bronet'.
'bronet' enclosing 'a' is 'BARONET'.
Can you help me to learn more?
(Other definitions for baronet that I've seen before include "Minor title" , "Minor noble" , "Bent oar (anag.)" , "A Bronte (anag.)" , "Aristocrat" .)