Orange-flavoured liqueur (9)
I believe the answer is:
cointreau
'orange-flavoured liqueur' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cointreau that I've seen before include "A sweet orange-flavoured liqueur for cautioner" , "Sweet orange-flavoured colourless liqueur" , "Orange liqueur" , "Alcoholic drink" .)