Any driver following it is bound to see red! (9)
I believe the answer is:
rearlight
'see red' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'any driver following it is bound' is the wordplay.
'any driver' becomes 'light' (I can't explain this - if you can you should believe this answer much more).
'following' means one lot of letters go next to another.
'it is bound' becomes 'rear' (rear is a kind of bound).
'light' after 'rear' is 'REARLIGHT'.
'to' is the link.
Can you help me to learn more?
(Another definition for rearlight that I've seen is " part of vehicle".)