Film a vehicle prior to it overturning (6)

I believe the answer is:

avanti

'film' is the definition.
(1972 film)

'a vehicle prior to it overturning' is the wordplay.
'vehicle' becomes 'van' (van is a kind of vehicle).
'prior to' means one lot of letters go next to another.
'overturning' says the letters should be written in reverse.
'it' reversed gives 'ti'.
'a'+'van'+'ti'='AVANTI'

(Another definition for avanti that I've seen is " Film".)

I've seen this clue in The Telegraph.

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