My vehicle is red (7)
I believe the answer is:
carmine
'is red' is the definition.
(synonyms)
'my vehicle' is the wordplay.
I cannot quite see how this works, but
'vehicle' could be 'car' (car is a kind of vehicle) and 'car' is present in the answer.
The remaining letters 'mine' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for carmine that I've seen before include "Vivid red colour" , "Bright red" , "Crimson pigment" .)