Everyday article (3)
I believe the answer is:
the
'everyday article' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for the that I've seen before include "The most frequently occurring word in the Bible (and in this clue!)" , "SECOND PART OF 23" , "Born - - - - - - - - (carol)" , "and 24 Down: Similar things" , "Over - - moon" .)