Beginning of first article (5)
I believe the answer is:
start
'beginning' is the definition.
(start is a kind of beginning)
'of first article' is the wordplay.
'of' indicates the answer is hidden within the clue.
'START' can be found hidden inside 'first article'.
(Other definitions for start that I've seen before include "Jump suddenly" , "Begin to recoil?" , "Outset" , "Begin with sudden movement of surprise" , "Begin - opening move" .)