Glass sipper (5)
I believe the answer is:
straw
'glass sipper' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for straw that I've seen before include "What a sucker gets given" , "Warts (anag.)" , "remnant of harvest" , "Dry stalk of grain" , "Stalk of dry grass" .)