Daily dissertation (5)
I believe the answer is:
paper
I believe this is a double definition.
'daily' is the first definition.
(newspaper)
'dissertation' is the second definition.
(I've seen this in another clue)
(Other definitions for paper that I've seen before include "Dissertation" , "Threat that seems powerful (but is just a pussy cat!)" , "Journal" , "News medium" , "Treatise" .)