Trouble with learner breaking wrecked car part (4,5)
I believe the answer is:
tail light
'part' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'trouble with learner breaking wrecked car' is the wordplay.
'trouble' becomes 'ail' (synonyms).
'with' indicates putting letters inside.
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'breaking' indicates putting letters inside.
'wrecked car' becomes 'tight' (I can't justify this - if you can you should believe this answer much more).
'ail' placed around 'l' is 'aill'.
'aill' inserted within 'tight' is 'TAIL-LIGHT'.
Can you help me to learn more?
(Other definitions for tail light that I've seen before include "followers'll see it" , "motoring requisite" , "fitting on back of bike?" , "Feature of Rover, say" , "car shows it braking" .)