The most common and most likely answer to this crossword clue is the 6 plus 2 plus 7 letter word DAPHNE DU MAURIER
D
A
P
H
N
E
D
U
M
A
U
R
I
E
R
More clues leading to the result DAPHNE DU MAURIER
Buddy explains!

The straight part
We know that "novelist" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case novelist = daphne du maurier.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.