Cool drink ordered here's free virtually, right? (9)
I believe the answer is:
'cool drink' is the definition.
(I know that cool drink is a common type of refresher)
'ordered here's free virtually right?' is the wordplay.
'ordered' indicates an anagram.
'virtually' means to remove the last letter (all but the last letter).
'right?' becomes 'r' (common abbreviation).
'heresfree' with its final letter removed is 'heresfre'.
'heresfre' anagrammed gives 'refreshe'.
(Other definitions for refresher that I've seen before include "Sort of course" , "Type of course" , "course of sorts" , "drink" , "This reinvigorates" .)