Titled lady one's seen in pubs (8)
I believe the answer is:
baroness
'titled lady' is the definition.
(I've seen this before)
'one's seen in pubs' is the wordplay.
'seen in' indicates putting letters inside.
'pubs' becomes 'bars' (I've seen this in other clues).
'ones' put within 'bars' is 'BARONESS'.
(Other definitions for baroness that I've seen before include "Peer's title" , "Lady Thatcher?" , "Noblewoman" , "Female life peer" , "Lady peer" .)