Classic road movie is dreary once finally edited (4,5)

I believe the answer is:

easy rider

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'classic road movie' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'is dreary once finally edited' is the wordplay.
'finally' indicates one should take the final letters.
'edited' is an anagram indicator.
The final letter of 'once' is 'e'.
'is'+'dreary'+'e'='isdrearye'
'isdrearye' with letters rearranged gives 'EASY RIDER'.

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(Other definitions for easy rider that I've seen before include "1969 road movie" , "Peter Fonda film" , "Nineteen sixty-nine road movie (Hopper, Nicholson)" , "Picture" , "counter-culture movie" .)

I've seen this clue in the Sydney Morning Herald.

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