Sort of dagger with a rough edge (6)
I believe the answer is:
ragged
'a rough edge' is the definition.
'ragged' can be an answer for 'edge' (thesaurus). I'm unsure of the 'a rough' bit.
'sort of dagger' is the wordplay.
'sort of' indicates an anagram.
'dagger' with letters rearranged gives 'RAGGED'.
'with' is the link.
Can you help me to learn more?
(Other definitions for ragged that I've seen before include "Scruffy" , "Of clothes, frayed and torn" , "Shabby" , "Old and torn, clothes say" , "Torn or frayed, or lacking finish" .)