Mac accepts it reversed after car operated without intervention (9)
I believe the answer is:
automatic
'operated without intervention' is the definition.
I can't tell whether this defines the answer.
'mac accepts it reversed after car' is the wordplay.
'accepts' indicates putting letters inside.
'reversed' says the letters should be written in reverse.
'after' means one lot of letters go next to another.
'car' becomes 'auto' (synonyms).
'it' reversed gives 'ti'.
'mac' going around 'ti' is 'matic'.
'matic' put after 'auto' is 'AUTOMATIC'.
Can you help me to learn more?
(Other definitions for automatic that I've seen before include "Unmanned" , "Without volition or conscious control" , "Self-loading" , "Done without thinking" , "Reflex" .)