The most common and most likely answer to this crossword clue is the 8 letter word TAILPIPE
I've seen this crossword clue in Independent
T
A
I
L
P
I
P
E
More clues leading to the result TAILPIPE
- Exhaust Spooner’s albino?
- Dog whistle in part of American’s car?
- US exhaust their athletes in London, putting in place extra starters
- Shadow churchwarden possibly, end where gas gets exhausted
- Follow musician's endless exhaust tube
- Inform about trouble with power converter’s core in part of vehicle
- Exhaust dog with constant exercise
- Shadow cabinet essentially cutting protective clothing? One might be fuming
Buddy explains!

The straight part
We know that "Exhaust" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case exhaust = tailpipe.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 TAILPIPE mean?
TAILPIPE noun- An exhaust pipe (on a vehicle) (in any configuration)
- An exhaust pipe exhausting to the aft of the vehicle