Got in touch after parking shunt (5)
I believe the answer is:
prang
'shunt' is the definition.
(I have seen 'Minor shunt' mean 'prang' so perhaps 'shunt' could also mean 'prang')
'got in touch after parking' is the wordplay.
'got in touch' becomes 'rang' (I can't explain this - if you can you should give a lot more credence to this answer).
'after' is a charade indicator (letters next to each other).
'parking' becomes 'p' (abbreviation on road signs).
'rang' after 'p' is 'PRANG'.
Can you help me to learn more?
(Other definitions for prang that I've seen before include "Minor shunt" , "Crash (informal)" , "nasty collision" , "Crash (a car, aircraft) (colloq.)" , "Crash (slang)" .)