It shows what you can expect from an American caravan (7)
I believe the answer is:
trailer
'caravan' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for trailer that I've seen before include "Vehicle designed to be towed by another" , "commercial vehicle drawn along" , "Appetising extract" , "vehicle without power" , "Mobile home; preview" .)