Rent man's getting involved in scraps (8)
I believe the answer is:
remnants
'scraps' is the definition.
('remnant' can be a synonym of 'scrap')
'rent man's getting involved in' is the wordplay.
'getting' means one lot of letters go next to another.
'involved in' indicates an anagram (involved can mean complex or confusing).
'rent'+'mans'='rentmans'
'rentmans' is an anagram of 'REMNANTS'.
(Other definitions for remnants that I've seen before include "Leftovers, scraps" , "Remaining pieces of cloth" , "Surviving fragments" , "Pieces at the end of rolls of fabric" , "Pieces of fabric left over" .)