It should be enough to cover the rent (5)
I believe the answer is:
patch
'cover the rent' is the definition.
'patch' can be an answer for 'cover' (thesaurus). I am not certain of the 'the rent' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for patch that I've seen before include "Mend by adding fabric" , "bed" , "Piece of cloth as decoration or to cover a hole" , "Material to cover repair" , "Small piece of ground" .)