The most common and most likely answer to this crossword clue is the 7 letter word LESSING
I've seen this crossword clue in The Times
L
E
S
S
I
N
G
More clues leading to the result LESSING
- Writer appearing when Grace gets bowled out
- Author with official approval, not British
- Singles falling in love again, she gave us
- Grace maybe topless is a source of drama
- Writer's happy event, having book out
- Doris and Grace going topless
- Novelist giving thanks for opening book being ignored
- Not so acceptable, being next to good novelist
Buddy explains!

The straight part
We know that "Writer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case writer = lessing.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.