Iced drink (6)
I believe the answer is:
frappe
'iced drink' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for frappe that I've seen before include "served cold" , "Like a cold drink" , "Fruit drink frozen to a mush" , "Of a drink, served iced or chilled" , "Iced coffee drink" .)