A President Ford car (7)
I believe the answer is:
lincoln
I believe this is a double definition.
'a president' is the first definition.
(Abraham (Abe) Lincoln)
'ford car' is the second definition.
(Lincoln Motor Company is a Ford company)
(Other definitions for lincoln that I've seen before include "Kind of green" , "Abraham --; -- green" , "Former US president" , "US politician?" , "theatre casualty" .)