Finds fault with vehicles going round the park (5)
I believe the answer is:
carps
'finds fault' is the definition.
(I've seen this in another clue)
'vehicles going round the park' is the wordplay.
'vehicles' becomes 'cars' (car is a kind of vehicle).
'going round' indicates putting letters inside (some letters go around others).
'the park' becomes 'p' (this could be a standard abbreviation which I don't know about).
'cars' going around 'p' is 'CARPS'.
'with' is the link.
Can you help me to learn more?
(Other definitions for carps that I've seen before include "Finds fault with" , "Makes trivial objections" .)