Trips need to be organised for the head of state (9)
I believe the answer is:
president
'the head of state' is the definition.
(president is a type of head of state)
'trips need to be organised' is the wordplay.
'to be organised' is an anagram indicator.
'trips'+'need'='tripsneed'
'tripsneed' anagrammed gives 'PRESIDENT'.
'for' is the link.
(Other definitions for president that I've seen before include "top job" , "Head of a republic - or a club" , "The elected head of a republic" , "The chief executive of a republic" , "the boss" .)