Escape in this car perhaps (7)
I believe the answer is:
'escape' is the definition.
(I've seen this before)
'in this car perhaps' is the wordplay.
'in' indicates a hidden word.
'SCARPER' is hidden in the letters of 'this car perhaps'.
(Other definitions for scarper that I've seen before include "Take to one's heels, cut and run" , "Vamoose" , "Escape" , "Run away (sl.)" , "Run away (colloq.)" .)