Untidy sort of dagger (6)
I believe the answer is:
ragged
'untidy' is the definition.
(thesaurus)
'sort of dagger' is the wordplay.
'sort of' indicates anagramming the letters.
'dagger' anagrammed gives 'RAGGED'.
(Other definitions for ragged that I've seen before include "Scruffy" , "Shabby" , "taunted" , "Of clothes, frayed and torn" , "Old and torn, clothes say" .)