Decrease in finance: stop filming (3)
I believe the answer is:
cut
This clue is a double definition.
'decrease in finance' is the first definition.
'stop filming' is the second definition.
(I've seen this before)
(Other definitions for cut that I've seen before include "Abbreviate" , "Slash" , "what hackers do" , "Shorten; (one's) share" , "Sever - hurt - snub" .)