At present everyone follows king, a wise guy (4-3)
I believe the answer is:
know-all
'a wise guy' is the definition.
(I've seen this before)
'at present everyone follows king' is the subsidiary indication.
'at present' becomes 'now' ('now' can be a synonym of 'at present').
'everyone' becomes 'all' (I've seen this before).
'follows' says to put letters next to each other.
'king' becomes 'k'.
'now'+'all'='nowall'
'nowall' put after 'k' is 'knowall'.
(Other definitions for know-all that I've seen before include "Someone who refuses to accept advice or information from others" , "Smarty-pants" , "Pretender to great learning" , "Boastful person who behaves like repository of information" , "Wise guy" .)