Revolutionary film dispenser (7)
I believe the answer is:
chemist
'dispenser' is the definition.
(I've seen this before)
'revolutionary film' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'film' becomes 'mist' (I've seen this before).
'che'+'mist'='CHEMIST'
(Other definitions for chemist that I've seen before include "Pharmacist, professional who dispenses drugs etc" , "Seller of medications" , "Nobel, say" , "Pharmacist, say" , "Pharmacist, apothecary" .)