Wear short muffler, one that goes with a zip (6,3)
I believe the answer is:
sports car
'one that goes with a zip' is the definition.
(to go with a zip is to move fast)
'wear short muffler' is the wordplay.
'wear' becomes 'sport' (sport can mean to wear or display on one's person).
'short' means to remove the last letter.
'muffler' becomes 'scarf' (I've seen this before).
'scarf' with its last letter taken away is 'scar'.
'sport'+'scar'='SPORTS-CAR'
(Other definitions for sports car that I've seen before include "Lamborghini?" , "flashy motor" , "Racer" , "Lotus perhaps" , "fast vehicle" .)