Film is something additional after a stroll in the park (4,5)
I believe the answer is:
easy rider
'film' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for easy rider that I've seen before include "Nineteen sixty-nine road movie (Hopper, Nicholson)" , "counter-culture movie" , "1969 road movie" , "Film about motor cyclists' travels" , "Picture" .)