Titled lady no one associated with a lord, somehow (5,5)
I believe the answer is:
lorna doone
'titled lady' is the definition.
(title character of a novel by Richard Doddridge)
'no one associated with a lord somehow' is the wordplay.
'associated with' means one lot of letters go next to another.
'somehow' indicates an anagram.
'no' after 'one' is 'oneno'.
'oneno'+'a'+'lord'='onenoalord'
'onenoalord' anagrammed gives 'LORNA DOONE'.
(Other definitions for lorna doone that I've seen before include "Richard Doddridge Blackmore heroine" , "Novel by R.D. Blackmore" , "Title" , "book" , "R. D. Blackmore novel" .)