Jane --, author of 'Northanger Abbey' (6)
I believe the answer is:
austen
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">jane</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that jane can be written as Austen)</span><br/ ><br/ >'<span class="explanation-format__original">author of northanger abbey</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that Northanger Abbey author Austen)</span><br/ ><br/ ></span>
(Other definitions for austen that I've seen before include "Persuasion writer" , "Jane ......wrote Sense and Sensibility" , "Author of Sense and Sensibility" , "Jane . . . . . . wrote 'Pride and Prejudice'" , "English novelist, portrayed middle-class families" .)