Rips into landlords' income (5)
I believe the answer is:
rents
I believe this clue is a double definition.
'rips' is the first definition.
('rent' can be a synonym of 'rip')
'landlords' income' is the second definition.
(I've seen this in another clue)
'into' is the link.
(Other definitions for rents that I've seen before include "Hires" , "Leases" , "tears" .)