Army or navy mechanic — I refit car (anag) (9)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
artificer
(Other definitions for artificer that I've seen before include "Skilled craftsman" , "Mechanic in the armed forces" , "Mechanic in the army or navy" , "Skilled worker" , "Military mechanic" .)