The most common and most likely answer to this crossword clue is the 4 letter word BIRO
I've seen this crossword clue in The Times
B
I
R
O
More clues leading to the result BIRO
- Writer, one in ball, pirouetting
- Writer’s book I take round
- Writer of panache newspaper advanced
- Writer providing life story about queen
- Backbone shown by circular letter writer
- Writer found in revolting moribund surroundings
- Writer in author I bossed around
- Writer‘s life includes reading or writing
- Pen made of bone turned round
- Writer and children’s author
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 = biro.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.
What does BIRO mean?
BIRO noun- A BIRO brand ballpoint pen.
- (by extension) Any ballpoint pen.
- (by extension) Ink from a ballpoint pen.