Online magazine keeps running commercial (8)
I believe the answer is:
economic
'commercial' is the definition.
(thesaurus)
'online magazine keeps running' is the wordplay.
'online' becomes 'e' (as in e-mail or e-commerce).
'magazine' becomes 'comic' (comic is a kind of magazine).
'keeps' indicates putting letters inside.
'running' becomes 'on' (I've seen this in other clues).
'comic' going around 'on' is 'conomic'.
'e'+'conomic'='ECONOMIC'
(Other definitions for economic that I've seen before include "Sparing with resources or money" , "Financially effective" , "Inexpensive" , "Relating to the circulation of money" , "system of money" .)