Real jerk tailgating car, ignoring old woman (9)
I believe the answer is:
authentic
'real' is the definition.
(I've seen this before)
'jerk tailgating car ignoring old woman' is the wordplay.
I cannot really see how this works, but
'jerk' could be 'tic' (jerking movement by the body) and 'tic' is found in the answer.
'car' could be 't' and 't' is found within the answer.
'woman' could be 'hen' and 'hen' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for authentic that I've seen before include "Genuine, not a copy" , "reliable" , "Bona fide" , "Real, genuine" , "24 [LEGIT]" .)