Delegate with messy air, disorientated (8)
I believe the answer is:
emissary
'delegate' is the definition.
(thesaurus)
'with messy air disorientated' is the wordplay.
'with' says to put letters next to each other.
'disorientated' indicates an anagram.
'messy'+'air' is 'messyair'.
'messyair' with letters rearranged gives 'EMISSARY'.
(Other definitions for emissary that I've seen before include "Spy" , "Diplomatic messenger" , "one dispatched officially" , "Delegate" , "Government messenger" .)