Rough-edged sort of dagger (6)
I believe the answer is:
ragged
'rough' is the definition.
(I've seen this in another clue)
'of dagger' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'dagger' is an anagram of 'RAGGED'.
'edged sort' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for ragged that I've seen before include "being poorly dressed" , "Threadbare" , "taunted" , "Dagger could be tattered" , "Torn or frayed, or lacking finish" .)