Likely to engage former car marque involved in type of motor racing (9)
I believe the answer is:
extrovert
'type of motor racing' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
'likely to engage former car marque involved' is the wordplay.
I cannot quite see how this works, but
'former' could be 'ex' (prefix meaning former or onetime) and 'ex' is present in the answer.
'car' could be 'rover' (former British car manufacturer) and 'rover' is found within the answer.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for extrovert that I've seen before include "Outgoing, socially confident" , "Sociable, outgoing person" , "Person who is outward-looking" , "Outgoing rather than inward-looking" , "being for going out" .)