Shoddy attempt to grab what remains (6)
I believe the answer is:
trashy
'shoddy' is the definition.
(thesaurus)
'attempt to grab what remains' is the wordplay.
'attempt' becomes 'try' (synonyms).
'to grab' is an insertion indicator.
'what remains' becomes 'ash' (what remains after a fire).
'try' enclosing 'ash' is 'TRASHY'.
(Other definitions for trashy that I've seen before include "Shoddy or ganger" , "Cheap and nasty" , "Shoddy and worthless" , "Useless" , "Poorly made" .)