Former PLO leader (6)
I believe the answer is:
arafat
'former plo leader' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arafat that I've seen before include "old statesman" , "Former PLO leader" , "Yasser -, former Palestinian leader" , "Palestinian leader, Nobel Peace Prize winner 1994" , "Yassir -. former Palestinian leader" .)