The most common and most likely answer to this crossword clue is the 8 letter word TRICYCLE
T
R
I
C
Y
C
L
E
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 = tricycle.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 TRICYCLE mean?
TRICYCLE noun- A cycle with three wheels, powered by pedals and usually intended for young children.
- A cycle rickshaw.
- To ride a tricycle.