Continue to shake vehicle (5)
I believe the answer is:
wagon
'vehicle' is the definition.
(wagon is a kind of vehicle)
'continue to shake' is the wordplay.
'continue' becomes 'on' (I've seen this in other clues).
'to' says to put letters next to each other (I've seen this in other clues).
'shake' becomes 'wag' (synonyms).
'on' put after 'wag' is 'WAGON'.
(Other definitions for wagon that I've seen before include "Trailer, railway truck" , "Four-wheeled goods vehicle" , "Transport" , "Vehicle carrying goods" , "Vehicle (on which abstainers travel?)" .)