Individual supporting Government has departed (4)
I believe the answer is:
gone
'departed' is the definition.
('go' can be a synonym of 'depart')
'individual supporting government' is the wordplay.
'individual' becomes 'one' (**).
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'government' becomes 'g'.
'one' put after 'g' is 'GONE'.
'has' acts as a link.
(Other definitions for gone that I've seen before include "No longer present" , "Departed or no longer available" , "... saga of 2's civil war" , "Departed, disappeared" , "Well in the past" .)