Made one get into the car (6)
I believe the answer is:
formed
'made' is the definition.
(forming is a kind of making)
'one get into the car' is the wordplay.
'one' becomes 'me' (a setter might use 'one' to humourously mean 'me').
'get into' means one lot of letters goes inside another.
'the car' becomes 'ford' (ford is a make of car).
'me' inserted inside 'ford' is 'FORMED'.
(Other definitions for formed that I've seen before include "Made" , "Moulded or constructed" , "Shaped" , "Gave shape to" .)