'Spectator', it's published every Sunday (8)
I believe the answer is:
observer
This could be a double definition.
'spectator' is the first definition.
(thesaurus)
'published every sunday' is the second definition.
'observer' can be an answer for 'sunday' (I've seen this before). I am not certain of the 'published every' bit.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for observer that I've seen before include "Watcher, spectator" , "One who watches" , "Non-participant; a paper" , "Viewer" , "Newspaper - witness" .)