Extremely ragged (6)
I believe the answer is:
frayed
'ragged' is the definition.
(synonyms)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for frayed that I've seen before include "Became strained" , "Ragged at the edges" , "in rough condition" , "Tattered and threadbare" , "Worn at the edge" .)