Car-rug on a robot? (9)
I believe the answer is:
automaton
'a robot?' is the definition.
(I know that robot can be written as automaton)
'car-rug on' is the wordplay.
'car' becomes 'auto' (automobile).
'rug' becomes 'mat' (both are floor coverings).
'auto'+'mat'+'on'='AUTOMATON'
(Other definitions for automaton that I've seen before include "Zombie" , "Mechanical figure" , "Robotic figure" , "working robot" , "One doesn't think" .)