The most common and most likely answer to this crossword clue is the 6 letter word JAGGED
I've seen this crossword clue in The Times
J
A
G
G
E
D
More clues leading to the result JAGGED
Buddy explains!

The straight part
We know that "Barbed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case barbed = jagged.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 JAGGED mean?
JAGGED verb- To cut unevenly.
- To tease.
- Unevenly cut; having the texture of something so cut.
- Having a rough quality.
- Of an array, having a different cardinality in each dimension, such that a representation on paper would appear uneven.