Hammer old car (6)
I believe the answer is:
beetle
This could be a double definition.
'hammer' is the first definition.
(I know that beetle is a type of hammer)
'old car' is the second definition.
'beetle' can be an answer for 'car' (Volkswagen Beetle). I am unsure of the 'old' bit.
Can you help me to learn more?
(Other definitions for beetle that I've seen before include "Hang over" , "E.g. ladybird" , "Insect; dice game" , "pest" , "An insect; a ramming tool" .)