Aware of article following working party (2,3,4)
I believe the answer is:
on the ball
'aware' is the definition.
(thesaurus)
'article following working party' is the wordplay.
'article' becomes 'the' (the definite article).
'following' says to put letters next to each other.
'working' becomes 'on' (on can mean working or activated).
'party' becomes 'ball' (ball is a kind of party).
'the' after 'on' is 'onthe'.
'onthe'+'ball'='ON THE BALL'
'of' is the link.
(Other definitions for on the ball that I've seen before include "players sometimes sign name here" , "Ready to take initiative" , "umpire may look for suspicious scratches here" , "like a balancing seal?" , "Alert - informed" .)