Take away motor parked by aristo (4,3)
I believe the answer is:
cart off
'take away' is the definition.
(carting off is a kind of taking away)
'motor parked by aristo' is the wordplay.
'motor' becomes 'car' (I've seen this before).
'parked by' says to put letters next to each other.
'aristo' becomes 'toff' (I've seen this before).
'car'+'toff'='CART OFF'
(Other definitions for cart off that I've seen before include "Take away (colloq.)" , "Remove" .)