Source arranged drugs for part of newspaper article (8)
I believe the answer is:
headline
'part of newspaper article' is the definition.
(top line of an article)
'source arranged drugs' is the wordplay.
'source' becomes 'head' (head is a kind of source).
'arranged drugs' becomes 'line' (line of cocaine arranged to be snorted).
'head'+'line'='HEADLINE'
'for' is the link.
(Other definitions for headline that I've seen before include "Writing above newspaper article" , "streamer, perhaps" , "Caption on a newspaper article" , "Newspaper title" , "Article title" .)