Exhaust Caucasian talking like Spooner? (8)

I believe the answer is:
tailpipe
'exhaust' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tailpipe that I've seen before include "End to an exhaust system" , "Car exhaust (US)" , "Rear section of exhaust" .)