Radical change sees tribal leader quoted in court (5-2)
I believe the answer is:
shake-up
'radical change' is the definition.
'tribal leader quoted in court' is the wordplay.
'tribal leader' becomes 'sheik'.
'quoted' shows a homophone (sound like).
'in court' becomes 'up'.
'sheik' is a homophone of 'shake'.
'shake'+'up'='SHAKE-UP'
'sees' is the link.
(Other definitions for shake-up that I've seen before include "Big change" , "A radical reorganisation" , "Drastic reorganisation" , "Radical reorganization" , "Fundamental change" .)