Sign of being low-rent (4)
I believe the answer is:
tear
This clue might be a double definition.
'sign of being low' is the first definition.
'tear' can be an answer for 'sign' (I have seen 'Sign of sorrow' mean 'tear' so perhaps 'sign' could also mean 'tear'). I'm not certain of the 'of being low' bit.
'rent' is the second definition.
(I know that rent can be written as tear)
Can you help me to learn more?
(Other definitions for tear that I've seen before include "Split - career" , "Rip, pull apart" , "Rip - drop from eye" , "Rip - eye moisture" , "Rip, sever roughly" .)