Article on every novel, capital (7)
I believe the answer is:
yerevan
'capital' is the definition.
(I've seen this before)
'article on every novel' is the wordplay.
'article' becomes 'an' (indefinite article).
'on' says to put letters next to each other.
'novel' indicates an anagram.
'every' is an anagram of 'yerev'.
'an' after 'yerev' is 'YEREVAN'.
(Other definitions for yerevan that I've seen before include "Capital of Armenia" , "east European city" , "ancient capital" .)