Scission (4)
I believe the answer is:
rent
'scission' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rent that I've seen before include "Payment for accommodation - that's torn it" , "Tear; lodger's payment" , "Torn, due to landlord" , "Payment for use of house" , "breach" .)