German car company (4)
I believe the answer is:
opel
'german car company' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for opel that I've seen before include "German subsidiary of General Motors" , "Car firm with" , "French-owned German car manufacturer" , "German motor manufacturer, 1871-1948" , "German car maker, d. 1948" .)