The most common and most likely answer to this crossword clue is the 9 letter word MOTORHOME
I've seen this crossword clue in The Daily Telegraph
M
O
T
O
R
H
O
M
E
More clues leading to the result MOTORHOME
Buddy explains!
The straight part
We know that "van" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case van = motorhome.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 MOTORHOME mean?
MOTORHOME noun- A type of recreational vehicle, a self-propelled structure built on a truck or bus chassis containing living accommodations.