Drink cures heart that's broken (10)
I believe the answer is:
chartreuse
'drink' is the definition.
(Chartreuse is an example)
'cures heart that's broken' is the wordplay.
'that's broken' indicates anagramming the letters.
'cures'+'heart'='curesheart'
'curesheart' anagrammed gives 'CHARTREUSE'.
(Other definitions for chartreuse that I've seen before include "Carthusian liqueur" , "green liquid" , "drink" , "The spirit" , "Green-yellow liqueur" .)