Write magazine's entertaining article (4)
I believe the answer is:
item
'article' is the definition.
(both can mean an object or thing)
'write magazine's entertaining' is the wordplay.
'entertaining' indicates a hidden word.
'ITEM' is hidden in the letters of 'write magazines'.
(Other definitions for item that I've seen before include "Also no more" , "Two people widely seen as one?" , "Single article on a list" , "Object, detail" , "pair?" .)