Would be important person with his writers (4)
I believe the answer is:
nibs
I believe this clue is a double definition.
'would be important person with his' is the first definition.
('his nibs' refers to a self-important person)
'writers' is the second definition.
(parts of pens, things which write)
(Other definitions for nibs that I've seen before include "Pen points" , "VIPs?" , "Points of pens" , "crushed cocoa beans" , "Crushed coffee/cocoa beans" .)