Fat buck out there spoilt film (4,2,3,6)
I believe the answer is:
back to the future
'film' is the definition.
(I've seen this before)
'fat buck out there spoilt' is the wordplay.
'spoilt' is an anagram indicator.
'fat'+'buck'+'out'+'there'='fatbuckoutthere'
'fatbuckoutthere' with letters rearranged gives 'BACK TO THE FUTURE'.
(Other definitions for back to the future that I've seen before include "Series of popular time-travel movies" , "film" .)