Woman in vehicle (old make) (8)
I believe the answer is:
caroline
'woman' is the definition.
'vehicle old make' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'make' becomes 'line' (I can't justify this - if you can you should give a lot more credence to this answer).
'car'+'o'+'line'='CAROLINE'
'in' is the link.
Can you help me to learn more?
(Other definitions for caroline that I've seen before include "Lady - Lamb, Lord Byron's lover" , "Girl's name - relating to Stuart king" , "No eclair for this girl" .)