The most common and most likely answer to this crossword clue is the 10 letter word DEPORTMENT
I've seen this crossword clue in The Daily Telegraph
D
E
P
O
R
T
M
E
N
T
More clues leading to the result DEPORTMENT
- Bearing right, soldiers enter arsenal
- Behaviour left your setter in depression
- Behaviour shown by this writer after drink when sunk in depression
- Manners: answer must be first found in olive branch
- Behaviour left people in debt — billions lost
- To expel people takes time for such conduct
- Expel people starting to trash carriage
- Carriage of French wine people start to tip
- From outside port, men took bearing
- Expel chaps before start of term for behaviour
Buddy explains!

The straight part
We know that "Carriage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case carriage = deportment.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 DEPORTMENT mean?
DEPORTMENT noun- Bearing; manner of presenting oneself.
- Conduct; public behavior.
- Apparent level of schooling or training.
- Self-discipline.