The most common and most likely answer to this crossword clue is the 8 letter word SCRIBBLE
I've seen this crossword clue in Financial Times
S
C
R
I
B
B
L
E
More clues leading to the result SCRIBBLE
- Small capitals current in poor quality writing
- Write about damming Scotland’s principal river
- Dash off with two churchmen getting stuck into evaluating relics
- Quickly sketch pirate wearing black cutting adult
- Dashed-off sketch in black is plagiarism, not amateur
- Draw the banks of scenic river
- Illegible handwriting of the lawyer sheltered by a reporter
Buddy explains!

The straight part
We know that "Write" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case write = scribble.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 SCRIBBLE mean?
SCRIBBLE noun- Careless, hasty writing, doodle or drawing
- To write or draw carelessly and in a hurry
- To doodle
- To card or tease (wool) coarsely; to run through a scribbler.