Neglected newspaper needs good editor (6)
I believe the answer is:
Here is my best explanation:
'neglected' is the definition.
'newspaper needs good editor' is the subsidiary indication.
'newspaper' becomes 'rag' (rag is a kind of newspaper).
'needs' means one lot of letters go next to another.
'good' becomes 'g' (abbreviation).
'editor' becomes 'ed'.
(Other definitions for ragged that I've seen before include "Played practical jokes - in tatters", "Teased; untidy; badly dressed", "Dressed in torn clothes", "Frayed or lacking smoothness", "Tattered and torn", "Torn or frayed, or lacking finish", "Threadbare", "Made fun of; tattered", "Shabby" and "Unevenly made".)