Leader ordered liar to die (9)
I believe the answer is:
editorial
'leader' is the definition.
(I've seen this before)
'ordered liar to die' is the wordplay.
'ordered' is an anagram indicator.
'liar'+'to'+'die'='liartodie'
'liartodie' is an anagram of 'EDITORIAL'.
(Other definitions for editorial that I've seen before include "Newspaper opinion piece" , "Article giving opinion of a newspaper" , "Leading article" , "Chief newspaper article" , "paper item" .)