The most common and most likely answer to this crossword clue is the 7 letter word RICKSHA
I've seen this crossword clue in The Guardian
R
I
C
K
S
H
A
More clues leading to the result RICKSHA
Buddy explains!

The straight part
We know that "Vehicle" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vehicle = ricksha.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 RICKSHA mean?
RICKSHA noun- A two-wheeled carriage pulled along by a person.