Editor is into new issues (8)
I believe the answer is:
editions
'issues' is the definition.
(I know this)
'editor is into new' is the wordplay.
'editor' becomes 'ed' (abbreviation).
'new' is an anagram indicator.
'is'+'into'='isinto'
'isinto' anagrammed gives 'itions'.
'ed'+'itions'='EDITIONS'
(Other definitions for editions that I've seen before include "Particular forms of published texts" , "Impressions given!" , "Repros" , "Book published at different times" , "Numbers" .)