This bean is used to make a liqueur (8)
I believe the answer is:
absinthe
'a liqueur' is the definition.
(absinthe is a kind of liqueur)
'this bean is used' is the wordplay.
'is used' is an anagram indicator.
'this'+'bean'='thisbean'
'thisbean' with letters rearranged gives 'ABSINTHE'.
'to make' is the link.
(Other definitions for absinthe that I've seen before include "Aniseed-flavoured liqueur" , "alcohol" , "Potent green gin-type liquor - wormwood" , "Strong liquour in the basin?" , "Potent aniseed-flavoured drink" .)