George's car scheme takes one in (9)
I believe the answer is:
autopilot
'george's' is the definition.
(I've seen this before)
'car scheme takes one in' is the wordplay.
'car' becomes 'auto' (automobile).
'scheme takes' becomes 'plot' (I can't justify this - if you can you should believe this answer much more).
'one' becomes 'i' (Roman numeral).
'in' means one lot of letters goes inside another.
'plot' enclosing 'i' is 'pilot'.
'auto'+'pilot'='AUTOPILOT'
Can you help me to learn more?
(Other definitions for autopilot that I've seen before include "Plane on ...... is under automatic control" , "Airman's 'George'" , "flight aid" , "Robot flier?" , "It can fly plane" .)