Pasolini's beginning a new movement in film (3)
I believe the answer is:
pan
'movement in film' is the definition.
(as in a camera panning)
'pasolini's beginning a new' is the wordplay.
'beginning' says to take the initial letters.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
The initial letter of 'pasolini' is 'p'.
'p'+'a'+'n'='PAN'
(Other definitions for pan that I've seen before include "In Greek myth, the god of flocks and herds" , "piece in the kitchen" , "Slate - cooking vessel" , "all in many words, initially" , "'Mythical god, half man, half goat (3)'" .)