Noblewoman wants pub on old headland (8)
I believe the answer is:
baroness
'noblewoman' is the definition.
(baroness is a kind of noblewoman)
'pub on old headland' is the wordplay.
'pub' becomes 'bar' (I've seen this before).
'on' says to put letters next to each other.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'headland' becomes 'ness' (I've seen this before).
'bar'+'o'+'ness'='BARONESS'
'wants' is the link.
(Other definitions for baroness that I've seen before include "Woman life-peer" , "Noblewoman" , "Titled lady" , "Thatcher possibly" , "Lady Thatcher?" .)