Pleasant place to walk and leave the car (4)
I believe the answer is:
park
'leave the car' is the definition.
'park' can be an answer for 'leave' (parking a car is leaving it somewhere). I am not sure about the 'the car' bit.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for park that I've seen before include "Open space for recreational use" , "Public open space" , "Recreation ground" , "Public gardens" , "Area for recreation in a city" .)