Drink distributed at a metro (8)
I believe the answer is:
amaretto
'drink' is the definition.
(I know that Amaretto is a type of drink)
'distributed at a metro' is the wordplay.
'distributed' indicates anagramming the letters.
'at'+'a'+'metro'='atametro'
'atametro' is an anagram of 'AMARETTO'.
(Other definitions for amaretto that I've seen before include "drink" , "Italian almond liqueur" , "Ma, rotate the almond liqueur" , "rink" , "Almond-flavoured liqueur" .)