With respect to novel, it's not be published (3,6)
I believe the answer is:
top secret
'not be published' is the definition.
I can't judge whether this definition defines the answer.
'with respect to novel' is the wordplay.
'with' means one lot of letters go next to another.
'novel' is an anagram indicator (letters in a new or novel order).
'respect' put next to 'to' is 'respectto'.
'respectto' is an anagram of 'TOP-SECRET'.
'it's' is the link.
Can you help me to learn more?
(Other definitions for top secret that I've seen before include "Highest classified (information)" , "Well-hidden" , "the knack of sleeping well?" , "Like highly guarded information" , "As 007 mission" .)