Forces out (6)
I believe the answer is:
ejects
'forces out' is the definition.
('eject' can be a synonym of 'force out')
This is all the clue.
(Other definitions for ejects that I've seen before include "Puts or throws out forcefully" , "Puts out by force" , "Squirts" , "Throws out, of a building perhaps" , "Discharges" .)