Completely outclass film studio (6)
I believe the answer is:
hammer
I believe this is a double definition.
'completely outclass' is the first definition.
(hammer can mean to comprehensively defeat)
'film studio' is the second definition.
(Hammer Film Productions is a film studio)
(Other definitions for hammer that I've seen before include "bash" , "Horrific house" , "See 24" , "Come under the . . . . . . - be for sale at auction" , "Hit the nail on the head with this" .)