Outgoing types required to co-operate with this (4,4)
I believe the answer is:
exit poll
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for exit poll that I've seen before include "Pixel lot (anag.)" , "Sample of how people voted" , "Test of voters' opinion on election day" , "Survey of voters just having voted" , "Enquiry into voters' opinions as they leave the voting station" .)