Free rein with Agent Orange? (9)
I believe the answer is:
tangerine
'orange?' is the definition.
(thesaurus)
'free rein with agent' is the wordplay.
'free' indicates an anagram.
'with' says to put letters next to each other.
'rein' put after 'agent' is 'agentrein'.
'agentrein' is an anagram of 'TANGERINE'.
(Other definitions for tangerine that I've seen before include "fruit product" , "Moroccan" , "Small citrus fruit with a loose skin" , "Tree" , "Variety of mandarin orange" .)