Drinking tube (5)
I believe the answer is:
straw
'drinking tube' 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 "Stalk of dry grass" , "Dry stalk of grain" , "Remains of corn" , "Thin tube; yellow" , "Dried grain stalks" .)